The zero-click era: how AI is reshaping Google search
Click-through rates, zero-click behavior, and publisher traffic impact from 2025–2026 studies.
The position-1 CTR collapse
Ahrefs tracked click-through rate on the top organic result for keywords that began triggering AI Overviews. Dashed line is the projected baseline absent AIOs.
Search with vs without an AI Overview
Click a study to see how user behavior changes when an AIO appears on the results page.
AI Overview saturation by vertical
Share of tracked SERPs in each industry that now surface an AI Overview.
Is ChatGPT picking up the slack?
Not yet. LLM referrals are growing fast in percentage terms but tiny in absolute terms.
Google Search didn't break quietly. Between the May 2024 launch of AI Overviews and the May 2025 rollout of AI Mode, the fundamental mechanics of how users interact with search results have been rewritten — and the data coming out of 2025 and early 2026 makes the shift impossible to ignore.
Position-one click-through rates have collapsed by as much as 58% on keywords that now trigger AI Overviews. Zero-click searches on news queries have climbed from 56% to 69% in twelve months. Publisher traffic from Google Search fell roughly 33% globally in 2025. And AI Mode, Google's fully conversational search experience, ends without any click to an external site in 93% of sessions.
For SEO professionals, agencies, and businesses that have built customer acquisition around organic search, the message is clear: the playbook has changed. Here's what the data actually shows and what you should be doing about it.
Multiple independent studies published in 2025 converge on the same conclusion: AI Overviews are measurably reducing clicks to organic results. The methodologies differ, but the direction doesn't.
Pew Research Center (July 2025) tracked 68,879 real Google searches from 900 U.S. adults during March 2025. Roughly 18% of those searches triggered an AI Overview. When one appeared, users clicked a traditional result just 8% of the time versus 15% without — a 47% relative decline in click behavior. Only 1% of users clicked a link inside the AI summary itself. Sessions also ended entirely more often: 26% of the time with an AIO, compared to 16% without.
Ahrefs ran a longitudinal study on 300,000 keywords split evenly between those that trigger AIOs and those that don't. Their December 2025 update found position-one CTR on AIO-triggering keywords had fallen to 1.6% — a 58% reduction against the projected baseline. Ahrefs Director of Content Ryan Law summarized the finding plainly: search is becoming zero-click.
Similarweb documented the zero-click shift at query level for news searches. In May 2024, 56% of news-related Google searches ended without a click. By May 2025 — after AIOs rolled out broadly — that figure hit 69%. A thirteen-point jump in twelve months, tracking almost perfectly with the AIO rollout timeline.
Other studies stack on top of these findings. Seer Interactive measured a 61% drop in organic CTR across AIO queries in their 3,119-query sample. Authoritas, in a submission to the UK Competition and Markets Authority, reported top-link CTR drops of up to 79% on news keywords. Amsive's analysis of 700,000 keywords found non-branded CTR down roughly 20% overall, with the penalty climbing to −37% when AIOs and featured snippets appear together.
Google's public position, articulated by VP of Search Liz Reid in August 2025, is that click volume has been "relatively stable" with slightly higher quality. The company has not released the supporting data, and every major independent study contradicts that framing.
AI Overviews sit above the traditional ten blue links. AI Mode replaces them entirely.
Google launched AI Mode to all U.S. users on May 20, 2025, and expanded it to 180 countries by October. By early 2026 it had reached an estimated 75–100 million monthly active users. The behavioral data is stark: both Semrush (analyzing 69 million U.S. desktop sessions) and Seer Interactive found that 92–94% of AI Mode sessions end without any click to an external site. Queries run about 7.2 words on average — roughly three times the length of standard Google searches — and sessions last twice as long, yet produce a fraction of the outbound traffic.
Worse for SEO strategy: only about 14% of URLs cited by AI Mode also rank in the traditional top ten for the same query (SE Ranking, August 2025). AI Mode has effectively created a parallel citation ecosystem where your standard rankings don't guarantee visibility. Strong rankings aren't the ceiling anymore; citation inside the AI response is.
The impact isn't evenly distributed. BrightEdge's May 2025 tracking showed AI Overview saturation reaching 87% on healthcare and education SERPs, 70% on B2B technology, and 63% on insurance — while e-commerce SERPs actually saw AIO frequency drop from 29% to 4% as Google pivoted those pages toward product grids. By early 2026, treatment and procedure queries were hitting 100% AIO saturation.
Publisher casualties tell the individual story. Business Insider reported organic search down 55% over three years and cut 21% of its staff. HubSpot saw organic traffic fall 70–80%. Forbes and HuffPost each lost roughly 50% of organic readers. CNN dropped 27–38%. In September 2025, Penske Media Corporation — parent of Rolling Stone, Billboard, and Variety — filed the first major U.S. publisher lawsuit specifically targeting AI Overviews, alleging affiliate revenue had fallen more than 33% from peak.
Among the top 50 U.S. news sites, only six were still growing year-over-year by July 2025. Verticals most exposed: informational content, how-to guides, affiliate reviews, recipes, travel content, and thin evergreen pages. Most resilient: branded queries, marketplace and e-commerce pages, and content tied to strong entity authority.
One of the most persistent myths in SEO conversations right now is that ChatGPT and other LLMs will replace the traffic Google is no longer sending. The numbers don't support that.
Similarweb tracked 1.13 billion monthly referral visits from all AI platforms combined to the top 1,000 sites in June 2025. In the same month, Google Search sent 191 billion. That's a 170-to-1 ratio. ChatGPT referrals to news sites grew 25× year-over-year — but starting from a tiny base. Conductor's aggregate across ten industries pegs total LLM referral share at roughly 1% of publisher traffic. Similarweb's own data shows AI referrals to external sites have been effectively flat from January 2025 through January 2026, even as AI platform usage grew nearly 30%.
The quality is better — Semrush reports LLM visitors convert about 4.4× higher than Google organic, and Adobe Analytics found AI-referred visitors stay 8% longer with 23% lower bounce rates — but the volume isn't there. ChatGPT hit 900 million weekly active users in February 2026, and Perplexity processed 780 million queries in May 2025 alone. These platforms are winning share of user attention; they are not, yet, replacing organic referral traffic.
The tactical response isn't a single pivot. It's a portfolio shift. Four priorities matter most:
Optimize for citation, not just ranking. When Seer Interactive analyzed SERPs with AI Overviews, brands cited inside the AIO earned 35% more organic clicks and 91% more paid clicks than non-cited competitors on the same page. The new visibility KPI is citation frequency in AI summaries. That means structured content with clear definitions, direct answers to specific questions, strong schema markup, and entity-rich language. If you haven't yet moved from keyword-first to entity-first content planning, now is the time.
Build brand equity as your traffic moat. Amsive found branded queries with AIOs actually delivered an 18.7% CTR lift — the opposite pattern from non-branded queries, which lost 20%. Ahrefs' end-of-2025 data showed AIOs triggering on only 13% of branded queries versus 25% of non-branded. Position Digital's correlation analysis suggests branded web mentions correlate roughly three times more strongly with AIO appearance than backlinks do. Invest accordingly: PR, unlinked brand mentions, digital footprint across review platforms and forums, and demand generation that makes users search for you by name.
Diversify beyond Google for both discovery and attribution. Newsletter audiences, YouTube, LinkedIn, community platforms, and direct app engagement are becoming essential rather than optional. Publishers that built direct audience relationships before 2024 are faring materially better than those that didn't. Track referral sources from every major AI platform — ChatGPT, Perplexity, Claude, Gemini, Copilot — and build optimization workflows for each. Semrush, Ahrefs, and several newer tools now track AI citations directly.
Double down on commercial and transactional queries. E-commerce SERPs have seen AIO frequency fall, not rise. Bottom-of-funnel queries — "buy," "near me," "pricing," "schedule" — still produce clicks. For local businesses and service providers, this is where the traffic still exists. If you're a local SEO client in Phoenix, Scottsdale, Tucson, or Flagstaff, the commercial intent queries that drive your leads are among the safest categories on Google right now. Informational content still matters for authority and citation — but lead-generating content is where organic clicks still reliably land.
What percentage of Google searches end without a click in 2026?
Roughly 56–58% of U.S. desktop Google searches end without any click, per SparkToro/Datos data through late 2025. For news queries specifically, the zero-click rate is 69% (Similarweb, May 2025).
How much have AI Overviews reduced click-through rates?
Independent studies show CTR reductions ranging from 15% to 79% depending on query type and position. The most rigorous measurements — Pew Research and Ahrefs — put the drop at roughly 47% to 58% on AIO-triggering keywords at position one.
Is Google AI Mode worse for SEO traffic than AI Overviews?
Yes. AI Mode sessions end without an external click 92–94% of the time, compared to standard Google SERPs which still produce clicks on roughly 44–66% of sessions. AI Mode also cites URLs that only match traditional top-ten rankings about 14% of the time.
Can LLM referrals from ChatGPT replace Google organic traffic?
Not at current scale. Google sends roughly 170 times more referral traffic than all AI platforms combined, and AI referral volume has been flat through 2025 even as AI usage has surged. LLM traffic converts better but doesn't yet offset organic losses.
Which industries are most affected by AI Overviews?
Healthcare and education SERPs show the highest AIO saturation (87%), followed by B2B technology (70%) and insurance (63%). E-commerce SERPs saw AIO frequency actually decrease as Google pivoted those pages to product grids.
The shift is structural, not cyclical. Google remains the dominant search interface, but the click — the output that SEO strategy has been built around for two decades — is becoming a vestige rather than the core result. Position-one CTR on AIO-eligible keywords has roughly halved in eighteen months. Publisher traffic has fallen a third. AI Mode is accelerating the change by removing the blue links entirely.
The winners in 2026 will be brands users already trust enough to search for by name, businesses that have built direct audience relationships beyond search, and SEO programs that treat AIO and LLM citation as the primary visibility KPI. The losers are the thin-margin informational publishers whose business models assumed Google would keep sending clicks. It won't — at least not at the volume they built around.
If you're reassessing your SEO strategy for this new landscape, our team at Digitaleer helps businesses across Phoenix, Scottsdale, Tucson, and Flagstaff adapt their content, technical SEO, and entity signals for AI-driven search. Get in touch to talk through what this means for your specific vertical.
