🤖 Algorithm Glossary
How the YouTube algorithm works in 2026: ranking signals, recommendation systems, search ranking factors, and the strategies you need to work with the algorithm — not against it.
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Essential (3 terms)
Dwell Time
How long a viewer spends watching your video before returning to search results. Longer dwell time signals relevance to the algorithm....
Session Time
Total time a viewer spends on YouTube after watching your video. The algorithm prioritizes videos that keep people watching longer....
Topic Authority
YouTube's assessment of your channel's expertise in a specific topic area, built through consistent, comprehensive coverage of related content....
Core Concepts (3 terms)
Shorts Algorithm
The separate recommendation system for Shorts that prioritizes swipe-through rate, loop rate, and first-2-second retention....
YouTube Algorithm
The recommendation system that decides which videos appear in search results, suggested videos, and the homepage for each viewer....
YouTube Trending Tab
A curated section on YouTube showing currently popular videos, personalized by region and based on engagement velocity....
Advanced Topics (2 terms)
Browse Features (Homepage)
YouTube's homepage recommendation surface showing personalized video suggestions to logged-in users based on their viewing history....
YouTube Search Ranking Factors
The signals YouTube's search algorithm uses to determine which videos rank highest for a given search query....
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