43% of Google searches show an AI Overview, with no dedicated reporting for ads
According to Similarweb's report The 2026 Generative AI Landscape, AI Overviews (the AI-generated summaries at the top of Google results) appear in around 43% of searches in the United States, up from 15% a year earlier. For Search advertisers, this new layer sits between the query and their ads, before any click.
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