Problem
Scenario
You are a product analyst for a large knowledge-sharing platform that recently changed the home feed ranking to show more personalized answers and fewer followed-topic posts. In the first 2 weeks after launch, average weekly sessions per active user rose from 4.8 to 5.4 (+13%), answers read per session increased from 6.1 to 6.8 (+11%), and upvotes per weekly active user increased 7%. At the same time, early signs of retention are mixed: new-user 1-week retention is flat at 31%, while returning-user 4-week retention has moved from 58% to 56%. Leadership wants to know whether the change truly improved both near-term engagement and long-term retention, or whether the engagement lift is masking lower habit formation.
Question
How would you evaluate whether this change improved both engagement and long-term retention, and how would you distinguish a real durable improvement from a short-term lift that could hurt user value over time?
Practicing as: Product Growth Analyst interview at QuoraHi, I'll play your Quora interviewer for the Product Growth Analyst role. Candidates describe these interviews as mixed and moderately difficult, so expect me to be professional and fair. Take your time with the question above and answer like we're in the room.
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