How TikTok and YouTube decide what you see next
Cold start: what a video feed shows a brand-new user
A new account has no history at all. But the feed must play something right away. What does TikTok show a person it knows nothing about?
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Candidates and ranking both start from a point on the map, and Rono has none. A feed that knows nothing about its user has a cold start.
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Yet his very first video has to be something. With no watch time, no likes and no list, what could the app pick for him?
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