metrics
Impressions
What impressions tell you about distribution, packaging tests, and why reach changes how you read CTR.
Updated 2026-05-29
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Definition
Impressions measure how often YouTube showed your video thumbnail to potential viewers on eligible surfaces.
Best use
Use impressions to understand whether a video had enough distribution for CTR, views, and packaging conclusions to be meaningful.
Watch out for
A low-impression video may have a high CTR simply because it was shown to a narrow, warm audience. A high-impression video may see CTR fall as YouTube tests it against broader audiences.