Measure a new Reels format launched worldwide at once
Measure impactHardProblem. Instagram launched a new Reels format (say, a new interactive template) to everyone globally on the same day — no holdout. Leadership wants its impact on watch time and creation. With no A/B, 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.