Attribution & Marketing-Mix Modelling Interview Questions & AnswersAnalytics & Measurement Interview Questions & Answers

Facebook Conversion Lift

Conversion Lift randomises users into Test and ______ groups.

Control

Reach

Ghost

Holdout ad‑on

The control group is withheld from ads to establish the counter‑factual baseline. Comparing outcomes isolates incremental lift.

Meta’s Feb 2025 update permits Lift on any event marked as ______.

Primary KPI

Page like

View

Comment

You can now promote deeper funnel or in‑app events as the success metric. This flexibility supports SaaS trials, micro‑conversions, and custom goals.

Lift percentage formula divides difference by ______ conversions.

Total

Impressions

Control

Test

Using control in the denominator normalises by baseline performance. It expresses incremental gain relative to what would have happened anyway.

Meta recommends at least ______ weekly conversions per cell for 80 % power.

50–100

10

5

1,000

Lower volumes inflate confidence intervals, making results inconclusive. Sample‑size calculator in Ads Manager flags under‑powered tests.

Lift study 'Confidence' column passes when p‑value is below ______.

0.05

0.01

0.5

0.9

A 5 % alpha level is the industry norm for statistical significance. Values above 0.05 indicate the observed lift might be due to chance.

People with ad blockers are excluded because Lift relies on ______ IDs.

3P cookies

Logged‑in FBIDs

IP only

Probabilistic IDs

Deterministic, hashed user IDs let Meta track exposure across devices. Ad‑block users without impression logging cannot be randomised accurately.

Geo Lift splits can use ______ regions when pixel coverage is low.

UID hash

DMA

Zip+4

Time zone

Designated Market Areas offer large, media‑consistent cells. They balance statistical power with manageable spill‑over risk.

Advantage+ Shopping campaigns became eligible for Lift via API in ______ 2025.

Oct

Jan

July

April

The April 2025 Marketing API changelog added support, expanding Lift beyond auction campaigns. Now 1P conversion data flows automatically.

Negative lift suggests ads may be ______.

Over budget

Under‑tagged

Using wrong window

Cannibalising organic demand

Exposure might shift conversions that would occur anyway, producing negative incremental value. Treat it as a signal to refine targeting or creative.

Extend test duration if 'Power' metric stays below ______%.

95

20

50

80

Statistical power reflects the probability of detecting a true effect. Under‑powered tests risk false negatives, so prolonging ensures reliable inference.

Starter

Review the basics.

Solid

Good job—refine for mastery.

Expert!

Outstanding performance.

Getting ready for Facebook Conversion Lift Interview Questions means understanding how lift studies go beyond simple clicks to measure real campaign impact. Start with our Attribution & Marketing-Mix Modelling interview questions to see where conversion lift fits into your broader mix framework. Then sharpen your skills with the attribution vs contribution practice MCQs to learn how credit gets shared across touchpoints. Next, dive into the last click limitations interview questions for insights on common tracking gaps. Finally, wrap up by reviewing the linear versus time decay resource to master how timing affects credit assignment.

Hi, I am Aniruddh Sharma. I’m a digital and growth marketing professional who loves transforming complex strategies into simple, interactive learning experiences. At QuizCrest, I design marketing quizzes that cover SEO, Google Ads, Meta Ads, analytics,…

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