Master Social Media Scrolling Virality Addon 60 V2 with 60 free flashcards. Study using spaced repetition and focus mode for effective learning in Marketing.
The shortlist of posts/videos retrieved for you before final ranking decides what gets shown next.
The step that quickly finds potentially relevant items from a huge catalog before more expensive ranking.
To scale: retrieval narrows billions of items to thousands; ranking then scores the shortlist more precisely.
An input variable used to predict outcomes (e.g., your recent watches, video length, creator relationship).
When a feature indirectly includes future information (or the target itself), making offline results look great but failing in production.
When creators optimize for a measurable proxy (watch time) in ways that don’t improve true value (satisfaction).
Because high engagement can still be harmful; regret signals help balance retention against long-term satisfaction.
Content that gets clicks/attention but leaves viewers feeling worse or misled, hurting long-term trust.
Deliberately mixing topics, creators, and formats so your feed doesn’t become repetitive or overly narrow.
Novel items feel fresh but may be less relevant; relevant items match known interests but can become boring over time.
People respond more to recent posts; platforms incorporate time decay so new items can compete with older winners.
A mechanism that gradually lowers the score of older content unless it keeps earning strong engagement.
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