Impressions
The number of times a platform reports showing an eligible thumbnail or content surface. An impression is an opportunity to be seen, not proof that someone watched.
Creator growth glossary
Clear terms before confident decisions.
Definitions are intentionally cautious. A metric is useful when it helps you decide what to inspect or test next—not when it is treated as a universal score.
Click-through rate (CTR)
The percentage of eligible impressions that resulted in a click or view under the platform's measurement rules. Context matters: traffic source, audience and content type can change what a healthy rate looks like.
Audience retention
A view of how much of a video people continue watching over time. A drop can identify a moment worth reviewing, but it does not by itself prove why viewers left.
Watch time
The total amount of time viewers spend watching content. It is different from average percentage viewed and should be interpreted alongside audience and traffic-source context.
Browse features
YouTube traffic surfaces such as Home and other browsing experiences where viewers discover videos without entering a specific search query.
Suggested videos
Traffic that comes from recommendations shown alongside or after other videos.
Shorts feed
The vertical short-form recommendation experience used to discover Shorts.
Packaging
The title, thumbnail and surrounding promise that help a viewer decide whether a video is relevant enough to click or watch.
Hook
The opening idea or execution that quickly confirms the viewer is getting the value promised by the packaging.
Content gap
A useful audience question, need or angle that is not being served well enough by the creator's current content set.
CPM
Cost per thousand ad impressions in an advertising context. The exact definition and reporting basis can vary by platform and campaign type.
RPM
Revenue per thousand views or another platform-defined unit after the platform's applicable revenue calculations. It should not be confused with CPM.
Incrementality
The additional outcome caused by an action compared with what would likely have happened without it. Attribution alone does not prove incrementality.
Activation
The point at which a new user reaches the first meaningful product outcome, rather than simply creating an account.
Retention
The degree to which users or viewers continue returning over time. Sustainable growth depends on more than first-time reach.