Cost per thousand viewable impressions. Only impressions that meet the Viewability standard count toward the bill, which shifts the risk of unseen inventory from advertiser to seller. Google Ads and most DSPs offer vCPM bidding on display; it is rarely offered on walled-garden social inventory, where viewability is reported but not priced.
Related terms
Used in The Signal
Cite this entry:
Agency Echelon. "vCPM." Agency Echelon Reference, reviewed September 2026. https://agencyechelon.com/reference/glossary/vcpm/