Verification applied after an impression is won, either by blocking the creative from rendering (showing a blank or fallback) or by measuring and reporting only. Post-bid blocking wastes the paid impression; pre-bid avoidance is preferred where the DSP supports it.
Related terms
Cite this entry:
Agency Echelon. "Post-Bid." Agency Echelon Reference, reviewed September 2026. https://agencyechelon.com/reference/glossary/post-bid/