Google's standard search ad format since 2022: the advertiser supplies up to 15 headlines and 4 descriptions, and Google assembles combinations per auction, testing which perform. Pinning fixes a headline in a position and reduces the combinations available. Microsoft Advertising uses the same model.
Cite this entry:
Agency Echelon. "Responsive Search Ad." Agency Echelon Reference, reviewed September 2026. https://agencyechelon.com/reference/glossary/responsive-search-ad/