Metrics & KPIs
Impression Share
By the AdFlint research team · Last reviewed July 2026
Impressions you received divided by the impressions you were eligible to receive, showing how much of the available auction volume you actually captured.
It exists only where the platform can estimate eligibility, and its real value lies in the companion columns: share lost to budget versus share lost to rank tells you whether money or quality is the binding constraint. The common misreading is chasing one hundred percent, which means paying up for the marginal impressions nobody else wanted.
Impression Share compared with
The settings this gets confused with, and how to tell them apart.
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