SEO Traffic Down, Impressions Stable: Measuring the AI Overviews Effect (2026 Method)

The symptom you are probably living through

Your Google rankings have not moved, your impressions have not either, and yet your organic clicks keep sliding month after month. If that sentence describes your Search Console, you probably do not have an SEO problem: you have an AI Overviews effect. When Google displays a generated answer above the results, part of your audience gets what they were looking for without clicking, and your clicks curve decouples from your impressions curve. The channel is changing, not your work.

The scale is documented: on queries showing an AI Overview, Seer Interactive measured organic CTR falling from 1.76% to 0.61% between mid-2024 and late 2025, before a partial rebound in early 2026; and according to BrightEdge, roughly 48% of tracked queries displayed an AI Overview in early 2026, up 58% year over year. In other words: the phenomenon is massive, but it does not hit every query the same way. That is where measurement earns its keep: knowing precisely where it hits you, specifically.

This is the method we apply every month to our own site, laid out in four steps, from Search Console to the dashboard you can present to your leadership.

Step 1: isolate the signature in Search Console

In Search Console, compare the last 3 months with the same period a year earlier, then read three curves together: impressions, average position, clicks. The AI Overviews signature is precise: impressions stable or rising, position stable, clicks and CTR falling. If your positions are dropping too, your problem is (at least partly) a ranking problem; do not mix the two diagnoses.

Then segment by query family, because the effect is highly uneven. Separate at minimum: branded queries (generally spared), informational queries ("how", "why", "what is", the hardest hit because they are the best covered by generated answers), and transactional or product queries. A filter on question words in the Queries report is enough for a first partition.

Step 2: check which queries actually display an AI Overview

Search Console does not (yet) tell you which queries trigger an AI Overview. The check remains manual but quick: take your 20 to 30 most important queries by impressions, test them in a private browsing window, and note three things: does an AI Overview appear, is your brand cited as a source in it, and who is cited in your place. Run the test again a week later, the displays vary.

This cross-check produces the matrix that drives everything else: queries with an AI Overview where you are cited (you lose clicks but gain exposure), queries with an AI Overview where you are absent (the real net loss), and queries with no AI Overview (your classic SEO, to defend as usual).

Step 3: measure what still arrives, in GA4

The counterpart of lost clicks is the traffic now coming from the AIs themselves. In GA4, build an exploration filtered on the referrers chatgpt.com, perplexity.ai, gemini.google.com and copilot.microsoft.com, or a custom channel that groups them. Two precautions when reading it: this traffic is still small in volume for most sites (measuring it is about tracking its growth, not about accounting for the lost clicks), and it is often of excellent quality, because the visitor arrives after already receiving a recommendation. Look at its conversion rate before judging it on volume.

Step 4: separate lost clicks from lost visibility

This is the distinction most analyses miss, and the one that changes decisions. Losing clicks on a query where the AI Overview cites you as a source is not the same as losing them on a query where it recommends your competitors. In the first case, your visibility has moved from the link into the answer: it is exposure that no longer shows up in sessions but still exists. In the second, you have disappeared from the decision journey. The click is measured in GA4; the citation is measured in the answers themselves, with the GEO indicators: citation rate, share of voice against your competitors, accuracy.

The formula to remember: your total visibility = organic clicks + citations in the answers. Reporting only the first half means presenting a decline; reporting both means presenting a transformation, and steering the part that is growing.

The 4-line dashboard for your leadership meeting

To present the topic to a leadership team without jargon, four lines are enough, measured monthly: organic clicks on non-branded queries (the classic SEO trend); the share of your strategic queries displaying an AI Overview (your exposure to the phenomenon); your brand's citation rate in those answers, against your 3 main competitors (the new visibility); sessions and conversions from the AI referral channel (the materialization). The first two explain the past, the last two prepare what comes next.

A word for B2B and SaaS teams: the mechanism is identical, but it hits your blog and documentation content first (the informational queries), while your "product" queries shift towards questions asked directly to chatbots, where shortlists are now built. Measuring only site traffic amounts to watching the front door while the conversation moves to another room.

What to conclude (and what not to)

Do not conclude that SEO is over: AI Overviews overwhelmingly cite pages that already rank well, and your SEO foundation remains the entry ticket for GEO. Do not conclude that nothing is changing either: the CTR lost on covered queries will not come back, and the rational response is not to mourn it but to win the position that now matters, that of cited source. The concrete moves are in our optimization checklist; continuous measurement, engine by engine, is what will tell you whether your actions are paying off. This topic moves fast; we will update this article as Google evolves the display and the measurement tools.

Frequently asked questions

How do I know whether my traffic drop comes from AI Overviews? Look for the signature: impressions and positions stable, clicks and CTR falling, concentrated on non-branded informational queries. If your positions are dropping too, the diagnosis is mixed and the ranking side should be treated first.

Does Search Console report AI Overviews? No, not as of this article's publication date: impressions and clicks tied to AI Overviews are blended into the overall data. Hence the manual check on your main queries, or automated tracking that tests these displays regularly.

How much traffic do AI Overviews take away? It depends entirely on your query mix. Industry studies (Seer Interactive) measured organic CTR erosion of around 60% on covered queries at the 2025 peak; a query that is not covered loses nothing. That is why the measurement has to run on your queries, not on market averages.

Does traffic from ChatGPT make up for the lost clicks? In volume, rarely so far. In value, it is often superior: the visitor arrives pre-convinced by a recommendation. Track its conversions separately before drawing conclusions.

Is being cited in an AI Overview without getting the click worth anything? Yes: it is brand exposure at the exact moment of the question, comparable to a prescription. It can be measured (citation rate, share of voice) and improved, whereas it is invisible in your analytics.

How can I track all of this without it eating my weeks? The GSC/GA4 part is set up once and then reviewed monthly. The citations part requires repeated tests across several engines: that is the job of a dedicated tracking tool, or of a one-off audit to establish the starting point.

Conclusion

Falling clicks at constant rankings is not a riddle, it is the new geometry of search: part of your visibility has left the results page and settled inside the answer. Measuring it means crossing three sources (Search Console for the signature, a display test for the exposure, GA4 for incoming AI traffic) and adding the metric your current tools ignore: your citation rate in the answers. To get that last piece in a few minutes, the free Sapian Metrics audit tests your strategic questions across 8 engines, including Google AI Overviews, and tells you who gets cited, you or your competitors.

---

Sources: Seer Interactive (organic CTR from 1.76% to 0.61% on queries with an AI Overview, mid-2024 to late 2025, partial rebound in early 2026) and BrightEdge (about 48% of tracked queries with an AI Overview in early 2026, up 58% year over year), via the SQ Magazine compilation.