Using online channels to attract and engage customers, communicate value, encourage relevant actions, and support relationships.
What is e-commerce?
The online buying and selling of products or services, including store experience and related transaction work.
How do digital marketing and e-commerce connect?
Marketing can attract and inform visitors; the e-commerce experience helps or hinders discovery, purchase, fulfillment, and loyalty.
What does a customer journey describe?
A person’s needs, decisions, and interactions with a brand over time.
What is a touchpoint?
An interaction between a customer and a brand, such as a search result, product page, email, or support contact.
What is a journey map?
A working view of an audience’s goals, stages, touchpoints, questions, friction, and evidence.
What are the simple marketing funnel stages in this guide?
Awareness, consideration, conversion, and loyalty.
What question is common in the awareness stage?
“What is this, and is it relevant to me?”
What question is common in the consideration stage?
“How does it compare with my options?”
What should a conversion measure define?
The specific completed action and its eligible denominator, time window, and segment.
Why is loyalty measured over time?
Repeat orders, renewals, or referrals describe an ongoing relationship rather than a single interaction.
Why is the funnel only a model?
Customers can enter at different stages, revisit decisions, and use several channels; the funnel does not explain every departure.
Business goal versus marketing objective
A business goal states an organization-level result; a marketing objective states a measurable result marketing can influence to support it, such as awareness, qualified visits, or sign-ups.
What does SMART mean for an objective?
Specific, measurable, achievable, relevant, and time-bound.
What is inclusive marketing?
Planning messages and experiences so they are relevant and usable for the intended audience without narrow assumptions or avoidable exclusion.
What is brand safety?
Considering whether a placement or context could undermine trust or conflict with an organization’s standards.
What is paid media?
Distribution or placement for which the organization pays, such as an advertisement.
What is owned media?
A publishing environment the organization controls, such as its website or an opt-in email program.
What is earned media?
Discussion, review, or sharing that other people or organizations choose to create.
What does SEO aim to improve?
The usefulness, accessibility, and relevance of pages that may earn unpaid search visibility.
What is paid search?
Advertising that can appear in response to selected search activity, subject to campaign settings and platform rules.
What does SEM mean in this guide?
This guide follows Google’s introductory usage: SEM uses paid ads in search results; SEO concerns unpaid visibility. Broader definitions can differ, so check the context.
What is one role of display advertising?
Use visual placements to build awareness or support a campaign, while managing audience and placement fit.
What is email marketing?
Sending relevant marketing messages to people who have chosen to receive them, with attention to consent and frequency.
What is one job of an e-commerce product page?
Answer customer questions about the product, availability, delivery, and next steps toward checkout.
What is a KPI?
A key performance indicator is a metric chosen to track progress toward a specific business or marketing objective.
What do impressions count?
Eligible displays under the reporting system’s rules; they do not necessarily represent unique people.
CTR formula
Clicks ÷ impressions × 100%.
Average CPC formula
Average CPC = total cost of ad clicks ÷ number of those clicks.
Click-based conversion-event rate formula (supplementary practice)
Counted conversion actions ÷ eligible ad clicks × 100%, using consistent counting and attribution rules. This event-based rate is not a share of unique buyers.
Average CPA formula
Average cost per action (CPA) = relevant ad cost ÷ counted conversion actions under a stated attribution rule; define the action.
ROAS formula
Attributed conversion value ÷ advertising spend; this guide uses purchase revenue as the value.
Why is ROAS not profit?
It compares attributed revenue with ad spend and excludes costs such as product costs, fulfillment, refunds, and overhead.
AOV formula
Selected revenue from a defined set of orders ÷ number of those same orders; state how discounts, returns, tax, and shipping are handled.
How should CAC be defined?
Acquisition costs divided by new customers for a stated cohort and period, with included costs specified.
Funnel-stage conversion rate formula
People reaching the next defined stage ÷ people in the current stage × 100%, within the same eligible cohort and window; count each person once per stage.
What does attribution do?
Assigns conversion credit to touchpoints according to a model and its rules.
What does first-touch attribution credit?
The first recorded touchpoint in the selected journey window.
What does last-touch attribution credit?
The last recorded touchpoint before the attributed action in the selected window.
Why is attribution not proof of causation?
Credit allocation follows a model; it does not show what would have happened without the campaign.
What can help estimate incrementality (supplementary practice)?
A credible comparison such as a randomized holdout when it is feasible, ethical, and well designed.
What is a measurement baseline?
A reference period or comparison used to interpret later results.
What details make a KPI reproducible?
Its counting definitions, denominator, data source, segment, time window, and attribution rule.
What is data storytelling?
Explaining the goal, result versus baseline, interpretation and limits, and a practical next action.
Name one data-ethics practice for marketing
Collect only data needed for the stated purpose, protect it, respect user choices, and avoid unsupported sensitive inferences.
Why can a high click count be a vanity metric?
Clicks alone may not show whether the intended audience completed a useful action or supported the business goal.
Why inspect the destination page before increasing ad spend?
A confusing or incomplete destination can lose customers even when the campaign attracts visits.
How should channel choice be made?
Match the audience and objective to channel fit, budget, content capacity, timing, measurement, and destination experience.
Why define reporting windows consistently?
Different windows can change which actions and touchpoints are counted, making comparisons misleading.
What is performance marketing?
Using measurable campaign results to assess progress and refine marketing decisions.
Quiz
A company runs ads online and also manages product listings and checkout on its store. Which description is most accurate?
Checkout is a marketing funnel stage but not e-commerce
The ads are digital marketing; listings and checkout are e-commerce work, and the activities can support one another (answer)
All activities are paid media
Digital marketing and e-commerce are identical terms
Digital marketing attracts and engages through online channels; e-commerce covers online buying and selling and its store experience.
Before selecting channels, what should a team clarify first?
The audience, business goal, marketing objective, and available budget (answer)
The total number of impressions it hopes to report
Which channel a competitor uses
The most popular platform this month
Channel choices should follow the goal, audience, and practical constraints.
A person first hears about a brand and decides whether it is relevant. Which funnel stage is this?
Conversion
Loyalty
Fulfillment
Awareness (answer)
Awareness concerns discovering the brand and initial relevance.
What does a customer journey map primarily capture?
A researched audience scenario, its touchpoints, questions, and friction (answer)
A guaranteed forecast of future sales
Only the advertising budget
Every customer’s exact sequence of actions
A journey map is a working model based on research; it is not a complete record of every person.
A customer receives an email, reads a product page, and contacts support. Each is an example of a:
KPI
Business goal
Attribution model
Touchpoint (answer)
A touchpoint is an interaction with the brand.
Many people view a product page but few start checkout. What is the best next step?
Inspect audience fit and possible product-page or checkout friction (answer)
Immediately double all advertising spend
Change the definition of a purchase
Stop measuring the journey
The drop-off identifies a question to investigate; it does not by itself explain the cause.
Why should a marketing funnel be treated as a planning model?
Every customer follows it in the same order
It proves why people leave
It replaces customer research
It describes a simplified progression, while real journeys can be nonlinear (answer)
People may enter at different stages, revisit decisions, or use several channels.
Which is a marketing objective rather than an organization-level business goal?
Increase profitable revenue over the year
Open three new stores
Improve the percentage of qualified visitors who complete a defined sign-up (answer)
Reduce company-wide operating costs
A marketing objective targets a measurable result that marketing can influence to support a broader business goal. Here, sign-up rate is that marketing result.
A team has defined its baseline and what counts as a qualified visit. Which objective is most measurable?
Make the brand more popular
Increase qualified product-page visits by 10% during the next quarter (answer)
Be better than competitors
Get more people interested
This option names the result, amount, and timeframe. The team still needs evidence that the target is achievable and relevant before calling it a complete SMART goal.
Which channel definition is correct?
Earned media is a placement the brand purchases
All email is earned media
Paid media is any positive customer review
Owned media is an environment the organization controls (answer)
Owned media includes publishing environments controlled by the organization, such as its site or opt-in email program.
What is a careful description of SEO?
Measuring checkout abandonment
Sending messages to an email list
Paying for every search result click
Improving pages so they may earn relevant unpaid search visibility (answer)
SEO focuses on the usefulness, accessibility, and relevance of pages that may appear in unpaid results.
How does this guide distinguish search engine marketing (SEM) from SEO?
SEM uses paid search ads; SEO seeks unpaid search visibility (answer)
SEM measures store purchases; SEO measures email engagement
SEM seeks unpaid visibility; SEO means paid search ads
SEM and SEO both mean paying for search ads
This follows Google’s introductory explanation: SEM uses paid search advertising and SEO concerns unpaid search visibility. Some other resources use a broader meaning of SEM.
A campaign receives 20,000 impressions and 800 clicks. What is its CTR?
0.4%
25%
4% (answer)
40%
CTR = 800 ÷ 20,000 × 100% = 4%.
A paid-search campaign incurs $360 in click costs and records 600 clicks. What is its average CPC?
$6.00
$0.60 (answer)
$1.67
$0.06
Average CPC = total click costs ÷ clicks = $360 ÷ 600 = $0.60 per click.
A store has 600 eligible sessions; 24 of those sessions include at least one purchase. What is its session purchase conversion rate?
24%
2%
4% (answer)
40%
Session purchase conversion rate = sessions with a purchase ÷ eligible sessions × 100% = 24 ÷ 600 × 100% = 4%. Count each qualifying session once.
A campaign spends $500 on ads and records 25 purchase actions under its stated attribution rule. What is its average CPA?
$0.05
$20 (answer)
$25
$500
Average cost per action (CPA) = relevant ad cost ÷ counted actions = $500 ÷ 25 = $20 per purchase action. This is not automatically the cost of acquiring one new customer.
A campaign has $3,000 attributed revenue and $600 ad spend. What is ROAS?
5× (answer)
4×
0.2×
500×
ROAS = $3,000 ÷ $600 = 5×.
Why is a 5× ROAS not enough to conclude that a campaign was profitable?
ROAS always measures profit exactly
Profit cannot be measured
It compares attributed revenue with ad spend and leaves other costs out (answer)
It is a measure of impressions
ROAS does not include product costs, fulfillment, refunds, overhead, or all other costs.
In the supplementary measurement examples, what is a key difference between attribution and incrementality?
Attribution assigns credit by a model; incrementality asks what additional outcomes the campaign caused (answer)
Incrementality divides impressions by clicks
They are identical measures
Attribution measures only store inventory
Attribution distributes credit among touchpoints; a credible comparison is needed to estimate what would have happened without the campaign.
A last-touch model credits which interaction?
Only an offline interaction
The first recorded interaction
The last recorded interaction before the action in the selected window (answer)
Every interaction equally in all cases
Last-touch attribution assigns credit to the last recorded touchpoint in the selected journey window.
A campaign reports 120 conversion events from 100 eligible ad clicks. Multiple actions can be counted per click. What can you conclude?
Exactly 120 new customers were acquired
There are 1.2 counted conversion events per eligible click; the share of unique buyers is unknown (answer)
Exactly 120% of unique visitors purchased
The data must be invalid because a conversion rate cannot exceed 100%
120 ÷ 100 = 1.2 events per click, or a 120% event-based conversion rate. Multiple events per interaction can produce a rate above 100%; event counts do not identify unique buyers or converting sessions.
Which reporting practice makes a KPI comparison more trustworthy?
Remove the baseline
Change the conversion definition for each campaign
Use total clicks as a substitute for every outcome
Use consistent metric definitions, attribution rules, segment definitions, and comparable reporting-window lengths (answer)
Keep the counting definitions and scope comparable. Actual counts and rates can change between reporting periods; consistency does not mean forcing their values to stay the same.
What does a useful data story include?
Only the best-performing number
Goal, result versus baseline, limits, and a next action (answer)
A guarantee that the same result will repeat
A chart without context
A data story explains what was measured, what changed, what remains uncertain, and what to do next.
Which is a responsible marketing-data practice?
Collect all available data in case it is useful
Use sensitive inferences whenever they improve targeting
Collect only what is needed for the stated purpose and protect it (answer)
Keep data forever without review
Data minimization, purpose limitation, user choice, and protection support responsible use.
A high click count is the only result a campaign reports. What is missing?
A new acronym
A second social channel
More impressions
A clear objective and evidence that clicks led to a useful outcome (answer)
Clicks do not establish that the intended customer completed a useful action or supported the business goal.
Read the summary for the big picture, then scan the mind map to see how the topics connect.
Review Course 1’s foundations, journey, strategy, and measurement concepts, with clearly labeled supplementary metric practice.
Course 1, Google’s Foundations of Digital Marketing and E-commerce, connects the roles and goals of the field to customer journeys, funnel stages, channel strategy, and performance measurement. The practical thread is to define the audience and desired marketing outcome first, then select channels and metrics that fit the goal and explain their limits.
Key points
Digital marketing attracts and engages customers through online channels; e-commerce supports online product discovery, purchase, fulfillment, and store performance.
A customer journey describes needs and touchpoints; a funnel is a simplified model of progression from awareness through loyalty.
A journey map should be grounded in customer research and observed behavior, not assumed feelings.
Choose channels after defining the business goal, marketing objective, audience, message, budget, and destination experience.
Paid, owned, and earned media describe different ways content reaches people and can overlap in one campaign.
This guide uses SEM for paid search and SEO for unpaid search visibility; display, social, email, and e-commerce content serve different channel roles.
Select KPIs to track a specific objective, then define their counting rules, denominator, time window, segment, and attribution rule before launch.
Supplementary calculations distinguish conversion events from converting sessions or users; all ratio denominators must be positive.
ROAS compares attributed revenue with ad spend; it does not measure profit.
Attribution assigns credit according to a model; it does not by itself establish incremental impact.
A data story includes context, change versus baseline, uncertainty, and a practical next action.
Common traps
Treating digital marketing and e-commerce as interchangeable.
Assuming every customer follows the same linear funnel.
Choosing channels before learning about the audience and objective.
Comparing rates that use different counting definitions, denominators, or reporting-window lengths.
Treating a click-based conversion-event rate as the percentage of unique people who purchased.
Dividing partially attributed revenue by an unrelated count of complete orders to calculate AOV.
Treating impressions as unique people or clicks as purchases.
Calling ROAS profit or CAC comparable without defining included costs.
Treating attribution credit as proof that a campaign caused the sale.
Reporting a metric without explaining what decision it should inform.
Foundations of Digital Marketing and E-commerce — Study Notes
Course: Google Career Certificates’ Foundations of Digital Marketing and E-commerce on Coursera — Course 1 of the Google Digital Marketing & E-commerce Certificate (four modules).
Style: A practical review of the course outline, with a repeatable way to connect a business goal to an audience, a customer journey, a channel plan, and a measurable outcome. The campaign numbers below are a simplified teaching example, not a benchmark.
Scope: The four PART sections follow the public outline for Course 1. Detailed metric calculations, CAC and AOV, and incrementality checks are HyNote supplementary practice. The quiz tests these notes and their stated assumptions; official course assessments may use different wording and examples.
Notation: CTR = click-through rate; CPC = cost per click; CPA = cost per action; ROAS = return on ad spend; CAC = customer acquisition cost; KPI = key performance indicator.
PART 1 — DIGITAL MARKETING AND E-COMMERCE FOUNDATIONS
1.1 Two connected fields
Digital marketing uses online channels to connect a business with potential and existing customers: attract attention, communicate value, encourage a relevant action, and support the relationship afterward. Channels can include search, social media, display advertising, and email.
E-commerce is the online buying and selling of products or services. The work may include understanding demand, building a useful online store, writing product listings, supporting checkout, fulfilling orders, and reviewing store performance. Digital marketing can bring qualified visitors to an e-commerce experience; the store experience then helps or hinders the purchase. They overlap, but the terms do not mean the same thing.
Example 1 — A small home-goods brand. A search ad and an email campaign are digital-marketing activities. Product descriptions, checkout, order updates, and returns are e-commerce activities. A campaign can generate clicks while the store still loses customers if shipping details are unclear or the product page answers too few questions.
1.2 Roles and responsibilities
Entry-level job titles vary by employer. A digital marketing coordinator might help plan campaigns, prepare channel content, coordinate a calendar, check links, and report results. An e-commerce analyst might review visits, product-page behavior, orders, and drop-off points. These are examples of common work, not universal job descriptions.
Useful transferable skills include clear writing, organization, customer empathy, spreadsheet literacy, careful analysis, and collaboration. A role may be agency-side, serving several clients, or in-house, working with one organization’s products and teams. Neither setting is inherently better; they offer different rhythms, constraints, and kinds of context.
1.3 A planning chain
A useful first-pass plan follows this order:
Business goal: the organization-level result, such as increasing profitable first-time orders.
Marketing objective: a result marketing can influence to support the business goal, such as brand awareness, qualified product-page visits, or completed first purchases. Define how that result will be measured.
Audience and need: whom the plan serves and what problem, motivation, or question they bring.
Value proposition and message: why the offer is relevant and what evidence supports the claim.
Journey and channels: how people may discover, evaluate, act, and return.
Budget, content, and operations: what the team can deliver and support.
Measurement: the KPI, denominator, time window, attribution rule, and decision threshold.
A plan is only as useful as its definitions. “Grow engagement” is vague until the team identifies the audience, the action that counts, the baseline, and the period. An objective should be specific, measurable, achievable, relevant to the business goal, and time-bound (SMART).
PART 2 — CUSTOMER JOURNEY AND MARKETING FUNNEL
2.1 Map the customer’s experience
A customer journey is the sequence of needs, decisions, and interactions a person may have with a brand. A touchpoint is an interaction along that journey, such as seeing a search result, reading a product page, receiving an email, or asking a support question.
A journey map makes the experience easier to inspect. For a defined audience and scenario, record:
the person’s goal and context;
stages and touchpoints;
questions, expectations, and friction at each point;
the channel or team responsible for the experience;
evidence available to confirm the map;
gaps to investigate before changing the plan.
A map is a working model, not a record of every customer. Build it from research and observed behavior rather than filling gaps with assumptions about what people feel.
2.2 Use the funnel as a planning aid
A simple marketing funnel describes a progression from awareness to consideration, conversion, and loyalty:
Stage
Customer question
Example signal to measure
Awareness
“What is this, and is it relevant to me?”
Qualified reach, impressions, or relevant visits
Consideration
“How does it compare with my options?”
Product-page engagement, comparison views, or sign-ups
Conversion
“Am I ready to take the next step?”
Purchases or another clearly defined action
Loyalty
“Would I return, renew, or recommend it?”
Repeat orders, renewal, or referrals over a stated period
The funnel helps a team ask where people progress or drop off. It is a simplification: people can enter through different stages, revisit earlier questions, compare several options, or purchase after an offline interaction. A funnel chart does not prove why someone left. An action’s role depends on the objective: a newsletter sign-up can be a conversion for a lead-generation campaign and an intermediate step in a purchase journey.
Example 2 — Find the bottleneck. Suppose a store gets many product-page visits but few checkout starts. The next question is not automatically “buy more ads.” Inspect price clarity, product information, shipping costs, trust signals, page usability, and whether the visits match the intended audience. A small customer-research task may be more useful than changing the channel budget.
2.3 Match measures to stages
Select measures that correspond to the objective. Reach measures describe exposure; engagement measures describe interaction; conversion measures describe the defined action; loyalty measures describe behavior over a longer relationship. State the unit, denominator, time window, and segment for each measure. Comparing rates with different definitions can create a false trend.
Inclusive marketing is part of journey quality. Check whether language, imagery, access needs, and assumptions about customers make the experience welcoming and usable for the intended audience. Brand safety also matters: the context in which a message appears can affect trust and perceived suitability.
PART 3 — STRATEGY, BRAND, AND CHANNELS
3.1 Build the strategy before choosing channels
A digital marketing and e-commerce strategy connects the business goal to audience insight, a clear value proposition, channel roles, content, budget, and measurement. Start with the customer and goal; then choose channels that can reach the audience and support the desired action. A channel should not be selected only because it is popular or familiar.
Branding shapes what people recognize and expect. A consistent identity and credible experience can help a brand become distinguishable, but brand claims must be supported by the product and customer experience. Brand safety asks whether a placement, partner, or context could undermine trust or conflict with the organization’s standards.
Paid, owned, and earned media describe different ways a message reaches people:
Paid: the organization pays for placement or distribution, such as an advertisement.
Owned: the organization controls the publishing environment, such as its website or an opt-in email program.
Earned: other people or organizations choose to discuss, review, or share the brand.
These categories can overlap in a campaign. For example, a paid creator placement may generate additional earned discussion. Keep the accounting and disclosure clear.
3.2 Common channel roles
Search engine optimization (SEO): improve the usefulness, accessibility, and relevance of pages that may appear in unpaid search results. Visibility takes time and is not guaranteed.
Search engine marketing (SEM / paid search): use paid ads to gain visibility in search results. This guide follows Google’s introductory usage: SEM covers paid search, while SEO concerns unpaid visibility. Broader definitions sometimes group both under search marketing, so check the context when using other resources. Paid search needs budget, suitable targeting, and careful measurement. See Google’s explanation of SEO and SEM.
Display advertising: use visual placements across sites or apps to build awareness or support a campaign. Placement, audience, and frequency need attention.
Social media marketing: publish content and interact with communities; paid social can extend reach to selected audiences. Platform and audience fit matter more than using every channel.
Email marketing: communicate with people who have chosen to receive messages. Relevance, consent, frequency, and a useful unsubscribe experience help protect trust.
E-commerce content: product titles, descriptions, imagery, availability, delivery information, and checkout guidance can answer questions at the point of decision.
Channel selection depends on the audience, objective, available creative, budget, timing, measurement, and the team’s ability to deliver a good destination experience. A channel mix should be tested and adapted, not treated as a universal formula.
3.3 SEO and paid search: different trade-offs
Decision
SEO (unpaid search)
Paid search
Primary mechanism
Improve pages so they can earn relevant unpaid visibility
Pay for eligible ads to appear for selected searches
Typical time horizon
Often builds gradually as content and reputation develop
Can begin delivering once a campaign is eligible and funded
Cost pattern
Requires sustained content, technical, and editorial work
Usually involves ongoing media spend plus campaign management
Control
Search visibility and placement are not fully controlled
Advertiser sets campaign parameters within platform rules
Useful signal
Relevant organic impressions, clicks, and meaningful downstream actions
Ad impressions, clicks, cost, and attributed actions
Example fit
Useful product, category, or information pages for recurring searches
Timely promotions or measurable search demand where paid reach is appropriate
Honest weakness
Results take time and ranking is not guaranteed
Performance depends on budget and attribution; visibility can stop when spend stops
Use the comparison to choose a job for each channel, not to declare a universal winner. Paid and unpaid search can support different needs and should be evaluated against the same business objective where possible.
PART 4 — PERFORMANCE, ATTRIBUTION, AND DATA STORYTELLING
4.1 Define measurement before launch
Performance marketing uses measurable campaign results to assess progress and refine marketing decisions. A KPI (key performance indicator) is a metric chosen to track progress toward a specific business or marketing objective. Record the campaign objective, KPI, numerator, denominator, data source, segment, reporting window, and attribution rule before launch. Keep a baseline so that a later result has a reference point.
The same label can hide different definitions. A conversion might mean a completed purchase, a qualified lead, or a sign-up. “Revenue” may or may not include discounts, refunds, taxes, or shipping. Write down what the report includes before comparing campaigns.
4.2 Common measures and supplementary calculation rules
Impressions count eligible displays of an ad or content item under the reporting system’s rules; they do not equal unique people.
Clicks count recorded interactions; check whether accidental or repeated activity is filtered.
CTR describes clicks relative to impressions.
Average CPC is the total cost of ad clicks divided by the number of clicks; use costs and clicks from the same campaign scope.
Conversion rate requires a named numerator and denominator. A click-based ad rate counts conversion actions per eligible ad click. A session purchase rate counts sessions with at least one purchase per eligible session; a user purchase rate counts purchasing users per eligible user. These measure different things. An event-based ad conversion rate can exceed 100% when multiple actions are counted for one interaction.
Average CPA (cost per action) is the relevant ad cost divided by the number of counted conversion actions under a stated attribution rule. Name the action, such as a purchase or sign-up. Some teams use CPA to mean cost per acquisition when the action is an acquisition; it is not automatically CAC because the customer definition and included costs can differ.
ROAS compares attributed conversion value with advertising spend. This guide uses purchase revenue as that value. ROAS does not include all business costs and does not measure profit or return on total investment.
Average order value (AOV) is the selected order revenue divided by the number of those same orders. Specify how discounts, returns, tax, and shipping are treated. Partial attribution credit is not automatically a count of complete orders.
Customer acquisition cost (CAC) depends on which acquisition costs and new customers are included. Define a consistent cohort and period.
All ratio denominators must be positive. A zero denominator makes the ratio undefined; report it as unavailable rather than 0. Keep event counts, sessions, users, and orders distinct, and compare metric definitions using consistent campaign scope, attribution rules, and reporting-window length.
A store runs a paid-search campaign. For one reporting window, it records 20,000 impressions, 800 eligible ad clicks, and $400 in click costs. It records 32 completed orders, each counted once and given full credit to this campaign, with $2,400 in revenue from those same 32 orders. For this example, revenue is after discounts and excludes tax and shipping; there are no returns. Use the same campaign scope, attribution rule, and window throughout.
AOV for these 32 fully credited orders = $2,400 ÷ 32 = $75 per order.
These values describe the campaign under the stated assumptions. The 4% click-based rate means four counted purchases per 100 eligible ad clicks; it does not tell us what percentage of unique people or store sessions purchased. A 6.0× ROAS does not mean the campaign earned six times its cost as profit: product costs, fulfillment, refunds, overhead, and uncredited effects are not included. Attribution assigns credit according to a rule; it does not by itself show what would have happened without the campaign.
4.4 Attribution and responsible interpretation
Attribution models distribute conversion credit among touchpoints. A first-touch model credits the first recorded touch; a last-touch model credits the last recorded touch; multi-touch approaches divide credit across selected interactions. Each follows a rule or estimation method with assumptions. The result depends on identity matching, tracking coverage, lookback window, channel definitions, and the model chosen. Model availability and eligible touchpoints depend on the reporting platform and its current configuration.
Supplementary practice — incrementality: When the decision is whether a channel caused additional outcomes, attribution alone is not enough. A randomized holdout or another credible comparison can estimate incrementality when it is feasible and ethical. Even experiments need sufficient sample, sound assignment, and attention to spillover and time effects.
Use data ethically: collect only what is needed for the stated purpose, protect it, respect user choices and applicable requirements, and avoid making sensitive inferences that the data cannot support. A chart should lead to a clear, qualified conclusion and a next action—not just a larger number.
A concise data story answers four questions: What was the goal? What changed relative to the baseline? What likely explains the pattern, and what remains uncertain? What should the team do next? Include the period and definitions so another person can reproduce the interpretation.
4.5 Final review checklist
Can you distinguish digital marketing from e-commerce while explaining how they connect?
Can you map an audience’s needs and touchpoints without treating the journey as perfectly linear?
Can you match an objective to a funnel stage and a defined KPI?
Can you explain paid, owned, and earned media with an example?
Can you choose channels based on audience, goal, budget, and destination experience?
Can you distinguish conversion-event, session, and user rates, and calculate CTR, average CPC, average CPA, ROAS, and AOV using matching data and positive denominators?
Can you explain why ROAS is not profit and attribution is not proof of incrementality?
Can you summarize data with its timeframe, definitions, uncertainty, and recommended action?
These are original HyNote study notes for Course 1, Foundations of Digital Marketing and E-commerce, in the Google Digital Marketing & E-commerce Certificate. They follow the public course outline and include original practice questions and supplementary metric calculations and incrementality examples. They are not official Google or Coursera materials, course transcripts, or official assessment questions. Metric definitions, costs, denominators, attribution rules, and reporting windows must be stated before use.
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