AI-generated summaries now appear in 43% of US Google searches measured by Similarweb, up from 15% a year earlier. Conversational AI Mode is growing alongside them, changing how people formulate questions and how publishers earn attention.
The change is not simply a new result format. Search is moving from directing users towards pages to assembling an answer first and presenting sources inside or around it.
Search is becoming longer and conversational
AI Overviews place a generated summary above conventional results. AI Mode supports follow-up questions and can inherit the context of an earlier search. Google says its query fan-out technique divides a question into subtopics, runs several searches and synthesises the findings with supporting links.
Similarweb estimates visits to the AI Mode web experience rose from 126 million in June 2025 to 279 million in May 2026. Google separately says AI Mode has more than one billion monthly users. The figures are not directly comparable because one counts estimated web visits and the other users across Google’s service.
Average query length increased 5.4% after AI Mode appeared. People can describe a complete problem in natural language instead of trying several short keyword combinations, then refine the answer within the same interface.
Similarweb builds estimates from analytics, anonymised device data, partnerships and public web information; they are modelled rather than direct Google counts. Its broader market data shows generative AI sites averaging 9.5 billion monthly visits, up 70% year over year, with 655 million monthly unique visitors.
Most ChatGPT users still use Google, suggesting that conversational assistants and conventional search are becoming complementary habits rather than mutually exclusive destinations.
A citation is not the same as a visitor
Publishers worry that a generated answer may use their reporting without sending a person to the page. Google has added links inside responses, article suggestions, page previews and more prominent source references, but has not published click-through data showing the effect.
Similarweb found web citations in ChatGPT responses increased from roughly 1.3% in June 2025 to 6.8% in May 2026 on US desktop. Travel, retail and sports showed higher citation rates because prices, availability and results change frequently.
The location of supporting content differs from the destination of clicks. About 65% of cited URLs sat two or three folders below a domain, usually detailed articles or product pages. Yet 58.8% of AI referral traffic landed on homepages.
After a May 7 interface update made brand links more prominent, Similarweb observed a 157.7% weekly increase in ChatGPT referrals and a 354.7% increase to homepages. The firm did not prove the interface alone caused the change, and the data does not cover Google AI Overviews.
Publishers therefore need two measures: which pages provide evidence and which pages receive visits. Optimising only the homepage may weaken citation relevance, while creating useful deep content does not guarantee commercial traffic.
Web economics are moving towards explicit access terms
As answer interfaces reduce direct visits, publishers are exploring compensation at the crawler level. Cloudflare’s private Pay per Crawl beta lets participating sites permit, block or charge authenticated AI crawlers and can return an HTTP 402 payment-required response.
Pricing access does not automatically replace advertising or subscriptions. It creates another negotiation point between sites whose content supports answers and platforms controlling user attention.
Google and other AI services need source ecosystems to remain economically healthy. More visible links, accurate attribution and useful previews can help, but the decisive evidence is whether users visit and whether publishers receive value when they do not.
Website operators should monitor citation visibility, referral destination, conversion and crawler activity separately. Structured, authoritative deep pages may be increasingly valuable as evidence even when headline traffic falls.
AI Overviews are no longer an occasional experiment if Similarweb’s 43% estimate is representative. Search is becoming an answer layer over the web. The next competitive question is not only which system gives the best summary, but whether the economic relationship underneath it continues to reward the sources that make a credible answer possible.
