Attribution models (last-click, multi-touch) in Digital Marketing - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding Last-Click Attribution

Which statement best describes the last-click attribution model in digital marketing?

A It assigns all credit for a conversion to the last marketing touchpoint before the sale.

B It divides credit equally among all marketing touchpoints in the customer journey.

C It assigns credit based on the time spent on each marketing channel.

D It ignores the last touchpoint and credits only the first interaction.

💡 Hint

Think about which interaction gets full credit in last-click attribution.

Last-click attribution gives 100% credit to the final touchpoint before conversion, ignoring earlier interactions.

📋 Factual

intermediate

Multi-Touch Attribution Basics

What is the main advantage of using a multi-touch attribution model over last-click attribution?

A It assigns credit only to paid advertising channels.

B It ignores early marketing efforts to focus on the final sale.

C It simplifies reporting by focusing on a single touchpoint.

D It distributes credit across multiple touchpoints to reflect the full customer journey.

💡 Hint

Consider how multi-touch attribution treats all interactions in the buying process.

Multi-touch attribution gives credit to several marketing touchpoints, showing how each contributes to the conversion.

🔍 Analysis

advanced

Comparing Attribution Models

Given a customer journey with three touchpoints: Email, Social Media, and Paid Search (in that order), which attribution model would assign all credit to the Email channel?

A Linear multi-touch attribution

B First-click attribution

C Last-click attribution

D Time-decay attribution

💡 Hint

Think about which model credits the first interaction fully.

First-click attribution assigns 100% credit to the first touchpoint, which is Email in this case.

❓ Reasoning

advanced

Choosing the Right Attribution Model

A company wants to understand how each marketing channel contributes over time, giving more credit to recent interactions but not ignoring earlier ones. Which attribution model fits this need best?

A Time-decay attribution

B First-click attribution

C Position-based attribution

D Last-click attribution

💡 Hint

Consider which model weights recent touchpoints more heavily but still credits earlier ones.

Time-decay attribution gives increasing credit to touchpoints closer to conversion while still acknowledging earlier interactions.

🚀 Application

expert

Calculating Conversion Credit in Multi-Touch Attribution

A customer interacts with three channels before buying: Display Ad, Email, and Paid Search. Using a linear multi-touch attribution model, how much credit does each channel receive for the conversion?

A Display Ad: 0%, Email: 0%, Paid Search: 100%

B Display Ad: 50%, Email: 25%, Paid Search: 25%

C Display Ad: 33.3%, Email: 33.3%, Paid Search: 33.3%

D Display Ad: 25%, Email: 50%, Paid Search: 25%

💡 Hint

Linear attribution splits credit equally among all touchpoints.

Linear multi-touch attribution divides credit equally, so each of the three channels gets one-third of the credit.

Practice

1. What does the last-click attribution model do in digital marketing?

easy

A. Distributes credit based on ad cost

B. Gives all credit to the final ad clicked before purchase

C. Ignores the last ad clicked and credits the first one

D. Shares credit equally among all ads seen

Solution

1. Step 1: Understand last-click attribution

   Last-click attribution assigns 100% credit to the last ad clicked before a purchase.

2. Step 2: Compare with other models

   Unlike multi-touch models, it does not share credit among multiple ads.

3. Final Answer:

   Gives all credit to the final ad clicked before purchase -> Option B

4. Quick Check:

   Last-click = final ad credit [OK]

Hint: Last-click means credit goes to the last ad clicked [OK]

Common Mistakes:

• Thinking credit is shared among all ads
• Confusing last-click with first-click attribution
• Assuming cost affects credit distribution

2. Which of the following correctly describes a multi-touch attribution model?

easy

A. It ignores all ads except the most expensive one

B. It gives all credit to the first ad clicked

C. It shares credit among multiple ads that influenced the customer

D. It credits only the ad with the highest click rate

Solution

1. Step 1: Define multi-touch attribution

   Multi-touch attribution divides credit among several ads that helped influence the customer.

2. Step 2: Eliminate incorrect options

   It does not give all credit to just one ad or ignore ads based on cost or click rate.

3. Final Answer:

   It shares credit among multiple ads that influenced the customer -> Option C

4. Quick Check:

   Multi-touch = shared credit [OK]

Hint: Multi-touch means credit is shared among ads [OK]

Common Mistakes:

• Confusing multi-touch with last-click
• Thinking only one ad gets credit
• Assuming credit depends on ad cost

3. Consider a customer who saw three ads: Ad A, Ad B, and Ad C. They clicked Ad A first, then Ad B, and finally Ad C before purchasing. In a last-click attribution model, which ad gets full credit?

medium

A. Ad A

B. All ads share credit equally

C. Ad B

D. Ad C

Solution

1. Step 1: Identify the last ad clicked

   The customer clicked Ad A, then Ad B, and lastly Ad C before purchase.

2. Step 2: Apply last-click attribution rule

   Last-click attribution gives 100% credit to the final ad clicked, which is Ad C.

3. Final Answer:

   Ad C -> Option D

4. Quick Check:

   Last-click credit = last ad clicked [OK]

Hint: Last-click means credit goes to the last clicked ad [OK]

Common Mistakes:

• Giving credit to the first or middle ad
• Sharing credit equally in last-click model
• Confusing last-click with multi-touch

4. A marketer uses a multi-touch attribution model but notices all credit is going to only one ad. What is the most likely error?

medium

A. They are actually using a last-click model by mistake

B. They shared credit equally among all ads

C. They ignored the last ad clicked

D. They gave credit based on ad cost

Solution

1. Step 1: Understand expected multi-touch behavior

   Multi-touch should share credit among multiple ads, not just one.

2. Step 2: Identify why all credit goes to one ad

   If all credit goes to one ad, likely the last-click model is used instead of multi-touch.

3. Final Answer:

   They are actually using a last-click model by mistake -> Option A

4. Quick Check:

   Single ad credit = last-click, not multi-touch [OK]

Hint: All credit to one ad? Check if last-click model is used [OK]

Common Mistakes:

• Assuming multi-touch always shares credit equally
• Ignoring model settings
• Confusing ad cost with credit assignment

5. A customer interacted with three ads: Ad X (first click), Ad Y (viewed but not clicked), and Ad Z (last click). Using a multi-touch attribution model that gives 40% credit to first click, 20% to views, and 40% to last click, how is the credit distributed?

hard

A. Ad X: 40%, Ad Y: 20%, Ad Z: 40%

B. Ad X: 33%, Ad Y: 33%, Ad Z: 33%

C. Ad X: 0%, Ad Y: 50%, Ad Z: 50%

D. Ad X: 100%, Ad Y: 0%, Ad Z: 0%

Solution

1. Step 1: Identify credit percentages per interaction type

   First click gets 40%, views get 20%, last click gets 40% credit.

2. Step 2: Assign credit to each ad

   Ad X is first click -> 40%, Ad Y is viewed -> 20%, Ad Z is last click -> 40%.

3. Final Answer:

   Ad X: 40%, Ad Y: 20%, Ad Z: 40% -> Option A

4. Quick Check:

   Credit split matches model percentages [OK]

Hint: Match credit percentages to ad interaction types [OK]

Common Mistakes:

• Ignoring view credit
• Splitting credit equally instead of weighted
• Confusing first and last click percentages