Measure a Marketplace trust badge you shipped to everyone
Measure impactHardProblem. Facebook Marketplace rolled out a "verified seller" badge to all eligible sellers at once — no holdout. Leadership wants to know its impact on buyer trust and transactions. With no clean A/B test, how do you measure it?
Before you reveal: say your answer out loud, as if you were in the real interview — get your reasoning across clearly first. There is no single correct answer: reading what the interviewer is really after and defending your own thinking is what makes an answer strong.