System Design · Meta · Medium
A social media platform currently serves a personalized feed made up entirely of posts from accounts in the viewer's friend graph. The team is considering adding content from creators the viewer does not follow. Before launching, you need to evaluate whether friend content actually generates more "social" value than unconnected content, and then design the launch experiment. Part A — Observational validation You have event-level logs including: feed_impressions(user_id,…
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