Gemini, AI Overviews, and what publishers can actually control

Pew numbers on AI Overview clicks, plus the on-site work that still matters when the summary keeps the user on Google.

AI Overviews put a summary above the classic blue links. Pew Research's March 2025 Google browsing study found AI Overviews on about 18% of searches. When a summary was present, clicks on traditional results fell to about 8%, versus about 15% without a summary. Clicks on a citation inside the summary were about 1% of visits. Most summaries — 88% — cited three or more sources.

Those numbers are the point of this post: Google can keep the user on Google, and you still have on-site work worth doing. Gemini and AI Overviews are not the same product surface, but for publishers the practical question is identical — what do you control when the answer stays in the SERP?

What you control vs what you do not

Blocking Google-Extended affects Gemini training, not classical Search crawling. Decide that policy on purpose. Do not confuse it with "appearing in AI Overviews."

Why the Pew numbers change the job

If Overviews appear on roughly one in five searches, and traditional clicks drop when they appear, chasing only blue-link CTR is incomplete. SparkToro / Similarweb data for January–April 2026 put zero-click Google searches around 68%, up from about 60% in 2024. Zero-click was already rising; AI summaries accelerate the pattern.

Your job shifts toward:

1. Being eligible as a cited source when a summary fires.
2. Remaining unambiguous as a brand when the user never clicks.
3. Catching branded demand later in Search Console and direct traffic.

Citation eligibility is not a BrandKnown score. The score measures website readiness. Citation selection is Google's.

On-site work that still matters

1. Let the crawler see the answer

Serve the definition, steps, or table in HTML. If the only clear answer appears after a client-side render, you are betting on rendering pipelines you do not operate. Prefer SSR or static HTML for pages you hope to be summarized from — see SSR vs CSR for AEO.

2. Write the first screenful as an answer

Open with a concrete definition or result, not a teaser. Assistants and Overviews reuse clear lead paragraphs. Soft pitches and "in today's landscape" throat-clearing waste the only sentences that might be lifted.

3. Keep the brand entity boring

Homepage H1, title tag, and Organization name should match. About pages and meta descriptions assistants reuse should define the company in the same noun phrase. When the Overview cites someone else, users who later search your brand still need one resolvable entity.

4. Earn third-party corroboration

Pew found 88% of summaries cited three or more sources. That implies diversity. Your blog alone is a weak bet. Documentation, reputable explainers, and accurate profiles raise the chance you are in the set — covered further in who gets cited in AI Overviews.

5. Measure without self-deception

Track impressions and branded queries. Track AI referral traffic when it exists. Do not invent a "Overview CTR" metric from vanity screenshots. A ~1% click-on-citation rate (Pew) means most Overview wins are visibility and branded lift, not session floods.

Gemini training vs Search visibility

Teams sometimes block Google-Extended hoping to "protect content" and accidentally think they opted out of Search features. They did not. Google-Extended is a training pathway for Gemini-related use. Search crawling and ranking follow other rules. Read the Google-Extended explainer before you flip the switch.

Conversely, allowing Google-Extended does not buy Overview citations. Training access and answer citation are different doors.

A publisher checklist for the next afternoon

1. Pick ten queries that already show Overviews in your category.
2. Note which domains are cited (not which brands you wish were cited).
3. Compare those pages to yours: definition clarity, freshness, independence.
4. Fix crawl blocks and JS-only answers on your best candidate pages.
5. Align entity fields on the homepage and Organization schema.
6. Schedule a branded-query check in Search Console for four to six weeks later.

Honest ceilings

• You cannot disable AI Overviews for your queries.
• You cannot guarantee a citation even with perfect HTML.
• Similarweb / TechCrunch (June 2025) noted AI platforms sent about 1.13B referrals to top sites while Google Search still sent about 191B in the same month — Search remains huge; AI referrals are growing but smaller.
• A passing BrandKnown scan proves readiness checks improved, not that Gemini will name you.

Mistakes to avoid

Publishers still control crawl access, clarity, and corroboration. Google controls whether an Overview appears and who it cites. Work your side of the line and measure branded demand when the click never comes.