Google’s AI Overviews now appear in nearly half of all searches, reshaping the web

Google’s AI-generated search answers, known as AI Overviews, now appear in 43% of all searches — up from 15% just one year ago — according to new data from market intelligence firm Similarweb. The rapid expansion signals a fundamental shift in how users interact with the world’s largest search engine, as Google increasingly becomes a destination for information rather than a gateway to other websites.

AI Overviews become the default search experience

Similarweb’s analysis, published in May 2026, tracks the growing integration of generative AI into Google’s core search product. What began as an experimental AI layer on top of traditional search results has become a central part of the search journey. The report notes that Google now frequently drops users directly into AI Overviews, where they can continue their research through the more conversational AI Mode.

During the same period, visits to Google’s AI Mode rose from 126 million in June 2025 to 279 million by May 2026 — more than doubling in less than a year. This growth suggests that users are increasingly engaging with AI-generated summaries rather than clicking through to external websites.

Longer queries and more time spent on Google

The shift is also changing how people formulate their searches. Similarweb’s data shows that the average length of Google searches has increased over the past year, indicating that users are replacing short keyword-based queries with longer, more natural conversational phrasing designed for AI responses. This behavioral change keeps users on Google’s platform longer, as the search engine itself becomes the primary source of answers.

Impact on publishers and referral traffic

The trend has been particularly painful for publishers, who have seen a steady decline in referral traffic from Google. AI Overviews often cite sources without requiring users to click through to the original article. While the number of AI responses that include a citation has risen more than fivefold over the past year, the overall click-through rate remains low. According to Similarweb, only 6.8% of U.S. ChatGPT desktop queries included citations as of May 2026, though some categories — such as travel, retail, and sports — fare better than others.

In response, some publishers are fighting back. Cloudflare recently introduced tools that allow websites to block AI crawlers unless AI companies pay for access to their content through its marketplace. This represents a growing tension between the platforms that rely on web content and the publishers who produce it.

Some hope for publishers: ChatGPT referrals improve

There is a glimmer of positive news for publishers. Similarweb reports that U.S. desktop referrals from ChatGPT have improved following a May 7, 2026 search update. The proportion of visits landing on webpages more than doubled — from 25% in March 2026 to nearly 60% by May 30, 2026. This suggests that when AI-driven search results include prominent blue links, users do take advantage of them.

Still, the larger trend remains unchanged. Google is transforming itself from a gateway to the wider web into a destination in its own right. For publishers, the challenge is to find sustainable models in a world where AI summaries increasingly replace direct traffic.

Conclusion

The data from Similarweb paints a clear picture: AI Overviews are no longer an experiment but a core feature of Google Search. As adoption continues to grow, the relationship between search engines, publishers, and users will continue to evolve. For now, the balance of power has shifted firmly toward AI-generated answers — and the web is adjusting accordingly.

FAQs

Q1: What percentage of Google searches now show AI Overviews?
According to Similarweb, AI Overviews appear in 43% of searches as of May 2026, up from 15% a year earlier.

Q2: How has AI Mode usage changed over the past year?
Visits to Google’s AI Mode rose from 126 million in June 2025 to 279 million by May 2026, more than doubling in that period.

Q3: Are publishers seeing any improvement in referral traffic from AI search?
Yes, ChatGPT desktop referrals improved after a May 7, 2026 update, with the proportion of visits landing on webpages rising from 25% in March 2026 to nearly 60% by late May 2026. However, overall referral traffic from Google’s AI Overviews remains low.