AI explainers

When Google shows ads in AI Overviews or AI Mode, it may add an AI explainer next to the ad. The explainer is text generated by Gemini models, not by the advertiser. Google states that advertisers can’t write, edit or approve explainers, and can’t opt out of them.

This is the main difference from the rest of the ad. Everything else comes from assets you supply in the campaign: headlines, descriptions, images, pricing and landing pages. For a responsive search ad that means 3 to 15 headlines of up to 30 characters and 2 to 4 descriptions of up to 90 characters. The explainer is the one part of the sponsored unit that sits outside that set.

Google describes explainers as part of its ads in AI Overviews and AI Mode, which sit in sections labeled “Sponsored” and visually distinguished from organic content. Google contrasts them directly with creative assets: assets are yours to write and approve, explainers are not.

Because there is no control over explainer text, the lever you have is the accuracy and consistency of what you supply: keep prices, product names and claims identical across headlines, descriptions and the landing page so nothing in your own material contradicts itself. Admux never generates ad content; you supply all creative, and Admux screens that creative against each channel’s rules before submission. Admux’s previews are representative, and they cannot show explainer text that Google writes at serving time. If a placement with Google-written text is unacceptable for a product, the only option is not to run Search for it, since AI placements can’t be excluded separately.