Google AI Overviews and AI Mode
AI Overviews and AI Mode are generated from Google's Search index using retrieval-augmented generation and query fan-out. A page is eligible as a supporting link if it is indexed and eligible for a snippet; there are no extra technical requirements or special markup. You can measure impressions in Search Console's Generative AI performance report and opt out with the Search generative AI control.
How Google says they work
Google describes its generative AI features as “rooted in our core Search ranking and quality systems,” using two techniques:[1]
- Retrieval-augmented generation (RAG), “also known as grounding”: core ranking systems retrieve relevant, up-to-date pages, and the model generates a response showing “prominent, clickable links to relevant web pages that support the information.”
- Query fan-out: “a set of concurrent, related queries generated by the model” to fetch more results. AI Mode breaks a question “into subtopics” and issues “a multitude of queries simultaneously.”[2]
AI Mode and AI Overviews “may use different models and techniques,” so their links vary.[3]
Eligibility
- The page must be indexed and eligible to show with a snippet. “There are no additional technical requirements.”[3] Vendor-documented
- The site must be included via the Search generative AI control in Search Console, which is on by default.[1][4] Vendor-documented
- No special files or schema: “You don’t need to create new machine readable files, AI text files, or markup,” and “there’s also no special schema.org structured data that you need to add.”[3] Vendor-documented
What Google recommends
- Non-commodity content: a unique point of view and first-hand experience, not restated common knowledge; readable paragraphs, sections and headings; image and video SEO for multimodal answers.[1]
- Access and accuracy: allow crawling in robots.txt and your CDN, use internal links, make structured data match visible text, and keep Merchant Center and Business Profile data current.[3]
What Google says you can ignore
Its “mythbusting” list: llms.txt and other special markup, “chunking” content into tiny pieces, rewriting content just for AI, seeking inauthentic mentions, and over-focusing on structured data.[1] Details on AEO myths.
Controls
- Search generative AI control (Search Console > Settings): include (default), exclude or inherit. Excluding removes links and stops your content from grounding responses in AI Overviews, AI Mode and generative features in Discover; Google says it is not a ranking signal for the rest of Search and does not affect training.[4]
- Preview controls:
nosnippet,data-nosnippet,max-snippetandnoindexlimit what is shown.[3][5] - Google-Extended does not affect Search inclusion or ranking.[6] It governs training and Gemini grounding, not AI Overviews.
Measurement
AI feature traffic is counted in the Search Console Performance report under the “Web” search type.[3] The Generative AI performance report, available to all sites since August 31, 2026, shows impressions from AI Overviews and AI Mode by page, country, date and device, and separates text-based from multimodal searches. It excludes Search Labs experiments.[7] Google says clicks from pages with AI Overviews are “higher quality.”[3]
Independent findings
- Two randomized field experiments (2026 working papers, not yet peer reviewed): AI Overviews cut outbound organic clicks by 39.8% and raised zero-click searches by 34.5%;[12] an AI Mode-only experience cut click-through by 18.8 percentage points.[13] Neither study found a better user experience. Independent study
- Pew (March 2025 data, now dated): 18% of 68,879 searches produced an AI summary; users clicked a link inside the summary in 1% of those visits. Wikipedia, YouTube and Reddit were the most cited sources.[8] Independent study
- Ahrefs estimated that AI Overviews reduced position-one click-through rate by 34.5% (March 2025 data) and by 58% (December 2025 data).[9][10] After AI Overviews launched in France on July 22, 2026, highly exposed domains saw median CTR fall 23.1% over a 9-day window.[14] Independent study
- Ahrefs found 76.1% of AI Overview citations ranked in the top 10 in July 2025,[11] but 37.9% in March 2026; it links the drop to query fan-out after AI Overviews moved to Gemini 3, and its parsing method also changed.[15] Independent study
- Seer Interactive (53 brands; correlational): on informational queries, brands cited in an AI Overview got 120% more organic clicks per impression than uncited brands, but 38% fewer than on queries without an AI Overview.[16] Independent study
- AI Overviews cut English Wikipedia search referrals by 5.45% (vs German) and 4.82% (vs French) in a difference-in-differences study (working paper).[17] Independent study
Why a page may not appear as a source
Work down this list; each step is documented by Google, and the order is our suggestion.
- Is it indexed? Inspect the URL and read the Page indexing report.[18] Google says a page must be indexed to be eligible, and that meeting the requirements does not guarantee crawling, indexing or serving.[1]
- Is it snippet-eligible? The page must be eligible to be shown in Google Search with a snippet.[1]
- Is the site included in the Search generative AI control? Google lists this as a condition in addition to the Search technical requirements.[1]
- Is the content commodity? Google contrasts commodity content (its example is “7 Tips for First-Time Homebuyers”), which is often based on common knowledge, with non-commodity content that gives a unique expert or first-hand view.[1]
- Are you measuring the right thing? Use the generative AI performance report in Search Console rather than third-party tools claiming internal Google metrics.[1]
Vendor-documented
Frequently asked questions
How do I get into AI Overviews?
Be indexed and snippet-eligible, answer the question better than other pages, and keep the generative AI control set to include. Google says there are no special requirements beyond normal SEO.
Can I opt out of AI Overviews but stay in Search?
Yes. Since August 31, 2026, the Search Console generative AI control lets any site exclude itself from AI Overviews, AI Mode and generative features in Discover without affecting the rest of Search.
Do AI Overviews reduce clicks to websites?
Yes. In a 2026 randomized trial, AI Overviews cut outbound organic clicks by 39.8%; in another, an AI Mode-only experience cut click-through by 18.8 percentage points. Neither is peer reviewed yet.
See also
References
Pages accessed September 28–30, 2026 unless a date is given. See all sources and our editorial policy.
- ^ "Optimizing your website for generative AI features on Google Search". Google Search Central. Added May 15, 2026; last updated July 10, 2026.
- ^ "AI Mode in Google Search: Updates from Google I/O 2025". Google (The Keyword). Published May 20, 2025.
- ^ "AI features and your website". Google Search Central. Last updated December 10, 2025.
- ^ "Search generative AI control". Search Console Help. Rolled out to all sites by August 31, 2026.
- ^ "Robots meta tag, data-nosnippet, and X-Robots-Tag specifications". Google Search Central.
- ^ "Google’s common crawlers (including Google-Extended)". Google Search Central. Last updated July 14, 2026.
- ^ "Generative AI performance report (Search)". Search Console Help. Rolled out to all sites by August 31, 2026.
- ^ "Google users are less likely to click on links when an AI summary appears in the results". Pew Research Center. Published July 22, 2025; March 2025 browsing data.
- ^ "AI Overviews Reduce Clicks by 34.5%". Ahrefs. Published April 17, 2025; March 2025 data.
- ^ "Update: AI Overviews Reduce Clicks by 58%". Ahrefs. Published February 4, 2026; December 2025 data.
- ^ "76% of AI Overview Citations Pull From the Top 10". Ahrefs. Published July 21, 2025.
- ^ "The Impact of Google AI Overviews on Publisher Traffic and User Experience: Evidence from a Field Experiment (Agarwal and Sen)". SSRN working paper (Indian School of Business; Carnegie Mellon University). Posted April 3, 2026; revised July 8, 2026. Not peer reviewed.
- ^ "AI in Search Reduces Publisher Referrals Without Improving User Experience: Experimental Evidence (Wang, Gleason, Bart, Wilson, Metaxa)". arXiv preprint (University of Pennsylvania; Northeastern University). Submitted August 18, 2026. Not peer reviewed.
- ^ "AI Overviews Cut CTR by 23.1% in France (Juliette Begue)". Ahrefs. Published September 16, 2026. Vendor study; 9-day post-launch window.
- ^ "Update: 38% of AI Overview Citations Pull From The Top 10 (Louise Linehan)". Ahrefs. Published March 2, 2026. Vendor study.
- ^ "AIO Impact on Google CTR: 2026 Update (McDonald, Cooley, Williams)". Seer Interactive. Published April 24, 2026; January 2025–February 2026 data. Correlational.
- ^ "Impact of AI Search Summaries on Website Traffic: Evidence from Google AI Overviews and Wikipedia (Khosravi and Yoganarasimhan)". arXiv working paper (University of Washington). Version 6, September 2, 2026. Not peer reviewed.
- ^ "Page indexing report". Search Console Help. Accessed October 29, 2026.