The percentage of the clearing price an exchange or SSP retains, historically 10 to 20 percent and now lower under buyer pressure and SPO. Disclosed in sellers.json-era transparency reports and visible in log-level data as the gap between the buyer's price and the publisher's payout.
Related terms
Cite this entry:
Agency Echelon. "Ad Exchange Fee." Agency Echelon Reference, reviewed September 2026. https://agencyechelon.com/reference/glossary/ad-exchange-fee/