AI Overviews and the Zero-Click Problem: What the Data Shows
Yes, AI Overviews are reducing clicks to websites, and the honest answer to “by how much” is a range rather than a single number. Depending on the study and method, the measured drop lands somewhere between roughly 34% and 61%, and about half of the broader decline was already happening before AI Overviews existed.
Here is what each study actually measured, why the numbers disagree, and what the picture means for your business.
How common are AI Overviews now?
AI Overviews appeared on roughly 48% of tracked Google queries by February 2026 (BrightEdge), up from about 31% a year earlier. They are no longer an edge case confined to informational long-tail queries.
The click-loss range, study by study
| Study | What it measured | Finding |
|---|---|---|
| Agarwal and Sen, pre-registered field experiment (n=1,065 US desktop Chrome users, Jan to Feb 2026) | Outbound organic clicks on triggered queries | 38 to 40% reduction |
| Pew Research Center (March 2025 data, 900 US adults) | CTR with and without an AI Overview | 8% vs 15%, about a 47% relative drop |
| Range across published methodologies | Varies | Roughly 34 to 61% |
The spread is not sloppiness. The studies differ in device, query mix, time window, and whether they measure absolute or relative change. A pre-registered experiment on triggered queries is not comparable to a clickstream panel across all searches. Anyone quoting one figure as the number is flattening real methodological differences.
Pew’s underlying finding is worth stating separately because it is often garbled: users were less likely to click a link when an AI summary was present, and clicks on sources inside the summary itself were rare, at around 1% of visits.
Zero-click is the broader trend
Zero-click search is the wider context AI Overviews sit inside. SparkToro’s analysis of Similarweb clickstream data, reported by Search Engine Land, found 68.01% of US Google searches ended without a click between January and April 2026, up from 60.45% in 2024.
Note the scope: US, Google, all query types. It is not a global figure and not an AI Overviews figure.
The crucial caveat: AI Overviews are not the whole story
Ahrefs notes that roughly half of the recent click decline predates AI Overviews, driven by earlier changes: richer results pages, on-SERP answers, featured snippets, and expanding search features that answered queries without a click years before generative summaries arrived.
This matters for how you respond. If you treat AI Overviews as a single new villain, you will over-index on one surface and miss a decade-long structural shift in how results pages work.
What about AI Mode?
AI Mode is the more aggressive surface. Semrush measured a ~93% zero-click rate for AI Mode across 69M US desktop sessions (May to July 2025). Two qualifiers keep that in perspective:
- It is an informational-query average. Transactional AI Mode queries still sent about 69% of clicks to sites.
- It was small. AI Mode was roughly 1% of sessions in that study window, real and worth watching but not yet dominant.
AI Mode is a distinct surface with its own mechanics, not a louder AI Overview. We break down how it assembles answers in Google AI Mode explained.
Not all queries lose equally
The averages hide the most useful pattern. Loss concentrates where a summary can fully satisfy the intent:
| Query type | Click impact | Why |
|---|---|---|
| Definitional, “what is X” | Highest loss | The answer fits in two sentences |
| How-to, simple | High loss | Steps summarize well |
| Comparison | Moderate | Users often want detail and sources |
| Transactional | Low | The user must reach a site to act |
| Navigational | Minimal | The user already knows the destination |
That distribution is the practical guide to where to spend. Protect and deepen the transactional and comparison pages closest to revenue; expect definitional pages to earn exposure rather than sessions.
Publishers are the canary
Publishers feel this first and hardest, because their business converts sessions directly into revenue. Their reported declines are the leading indicator most often cited in coverage of this shift, and they are the reason roughly a third of publishers surveyed said they would consider blocking Google’s generative features, an option Google began testing as a Search Console toggle in June 2026.
For most businesses the calculus is different: you sell something other than pageviews, so an unclicked mention still has value. The tradeoffs are in should you block AI crawlers.
What your business should do about it
- Change what you measure. Sessions alone will understate the channel. Track presence, citations, accuracy and branded search alongside traffic. See the AI visibility metrics that actually matter.
- Use the new exposure data. Google’s Search Console generative AI report (June 2026) and Bing’s equivalent give impressions for AI features, though neither reports clicks. Setup is in tracking AI traffic in GA4 and Search Console.
- Prioritize the pages that still earn clicks. Transactional and decision content retains far more click-through.
- Make sure that when you are summarized, you are named. If the click is going away, the brand impression is the asset. That is entity work.
- Write so a summary quotes you correctly. Answer-first passages with the evidence attached. See content chunking for AI.
Where the zero-click data leaves you
The honest summary: clicks per ranking are falling, AI Overviews are a major accelerant but not the sole cause, the decline varies hugely by query type, and the range across credible studies is wide enough that any single headline number should be treated with suspicion.
The strategic response is not to chase the old click, it is to be the brand named in the answer that replaced it. To see how often that is currently you, request an AI visibility audit.
Frequently asked questions
How much do AI Overviews reduce clicks?
There is no single settled number. A pre-registered field experiment by Agarwal and Sen (n=1,065 US desktop Chrome users, January to February 2026) found AI Overviews cut outbound organic clicks by roughly 38 to 40% on triggered queries, while Pew Research (March 2025 data) measured a click-through rate of 8% with an AI Overview versus 15% without, about a 47% relative drop. Across methodologies the reported decline spans roughly 34 to 61%, so treat it as a range.
What is a zero-click search?
A zero-click search is a query that ends without the user clicking through to any website, because the answer is read on the results page. SparkToro's analysis of Similarweb clickstream data found 68.01% of US Google searches ended without a click between January and April 2026, up from 60.45% in 2024.
Are AI Overviews the only reason clicks are falling?
No. Ahrefs notes roughly half of the recent click decline predates AI Overviews, driven by earlier changes such as richer results pages and on-SERP answers. AI Overviews accelerate a trend already underway, so they are a major factor but not the sole cause.
Does Google AI Mode make zero-click worse?
It depends on intent. Semrush measured a ~93% zero-click rate for AI Mode across 69M US desktop sessions (May to July 2025), but that is an informational-query average; transactional AI Mode queries still sent about 69% of clicks to sites. AI Mode was roughly 1% of sessions in that window.
Do AI Overviews affect all queries equally?
No. Informational and definitional queries lose the most clicks, because the answer fits in a summary. Transactional and navigational queries are far less affected, since the user still needs to reach a site to act.
What should I do about zero-click search?
Shift measurement toward exposure and brand outcomes rather than sessions alone, protect and prioritize the transactional pages that still earn clicks, and structure content so that when your brand is summarized it is named and described accurately.