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SEO Basics

Do you need an AI-only file to appear in AI Overviews? The SEO basics Google actually documents

You've probably heard it: to show up in AI search, you first need a file that only AI reads. Google has answered this in its own documentation. Let's open that page together, see why the starting line for AI Overviews is still plain SEO, and check in three minutes whether your page is standing on it.

November 10, 2026CHROMETI Research8 min read

Google's answer: there's no extra file to make

"You need an AI file before AI search will show you." "There's special markup that AI prefers." Hear enough of this and you start to feel you've missed something.

For Google Search's AI features, at least, you don't have to guess. Google Search Central's "AI features and your website" page spells it out. AI Overviews and AI Mode have no additional requirements, and no special optimization is needed. You don't have to create new machine-readable files, AI text files or extra markup, and there's no special schema.org structured data you must add.

So what are the conditions? The page names two. The page has to be indexed by Google, and it has to be eligible to appear in Google Search with a snippet (the short description under the title). A page that meets both can become a supporting link, the link that sits next to an answer in AI Overviews and AI Mode.

What it takes to appear in AI Overviews, straight from Google's docs

Listed as not needed Nothing new to build New machine-readable files AI text files Extra markup for AI features Special schema.org structured data This is about Google Search's AI features. Other AI services have their own guidance to check.
Listed as needed Two basic Search conditions Indexed by Google Eligible to show with a snippet Zero additional technical requirements. If your page already shows on Google with a description, it's already on the starting line.
The ticket to AI Overviews is a basic Search condition, not a new file. Based on the page's last update (December 10, 2025).

AI Overviews stand on top of the Search index

The reason is easier to see once you look at the order in which Google Search meets a page. Google describes Search in three stages: crawling, where pages are found and fetched; indexing, where their content is read and stored; and serving, where fitting results are chosen when someone searches. It adds that not every page makes it through every stage.

The links that AI Overviews and AI Mode attach to an answer come from the end of that same flow. That's why the order matters. A page that's blocked at the crawling stage will struggle to become a supporting link, whatever you add on top later.

The order in which Google Search meets a page

  1. 01 · CrawlFinds and fetches the pageGoogle's crawler follows links to reach the page. If robots.txt or server settings block it, it stops here.
  2. 02 · IndexReads and stores itText, images and video are read and stored. Not every page gets stored.
  3. 03 · ServeShows it as a resultPicks results that fit the searcher and shows them with a title and snippet.
  4. 04 · AI featuresAI Overviews · AI ModeBuilds an answer and attaches supporting links from pages that are indexed and can show a snippet.
AI features sit on top of the first three steps. A page that stops early never reaches the last box.

Worth knowing while we're here: Google states that it costs nothing to get a page into search results, and that it doesn't accept payment to crawl a site more often or rank it higher. If someone offers to "guarantee" AI search visibility for a fee, remember those two lines first.

This starting line is getting crowded

"Isn't AI search still a small slice?" Google's own figures from this year say otherwise. On the July 2026 earnings call, CEO Sundar Pichai said AI Mode passed 1 billion monthly active users after expanding globally last October, and that AI features in Search now send billions of clicks to websites every week. In October he added that AI Mode queries are, on average, three times longer than traditional searches.

Longer queries mean customers now pack their conditions and situation into a single sentence. The supporting links next to those answers are still picked from indexed pages. As usage grows, so does what a page misses by not being on the starting line.

Google's AI search in 2026, in numbers

AI Mode · Jul 2026 1B+ Monthly active users Passed after the global expansion last October.
AI features · Jul 2026 Billions a week Clicks sent to websites Clicks that reached sites through AI features in Search.
Query length · Oct 2026 3× on average AI Mode queries Three times longer than traditional searches, on average.
All three figures come from the CEO's own remarks on Alphabet earnings calls. No breakdown by country or industry was given.

The basics Google says still work

The same page lists SEO basics that remain relevant for AI features. None of them are new tricks. They're things you'd do for Search anyway. In plain words:

The SEO basics in Google's doc, in plain words

robots.txt · CDNDon't block crawlingAllow Google to crawl in robots.txt, and in your CDN or hosting settings too.
Internal linksEasy to findOther pages on your site link to it, so it can be reached by following links.
Page experiencePleasant to useVisitors can view and use the page comfortably.
TextKey content as textWhat matters most is on the page as text, too.
Images · videoBacked up with visualsSupport your text with high-quality images and video where it helps.
Structured dataSame values as the pageWhat machines read matches what people see on the page.
Merchant Center · Business ProfileKeep your listings currentIf you sell products or have a location, keep the information you've given Google up to date.
Not new skills, just the SEO work you already know. Each card restates a line from the document in plain words.

It's a familiar list. Rather than AI search inventing new rules, it's closer to say that pages that keep the basics of Search also start on the line for AI answers.

Block the snippet and you drop out of AI Overviews too

One basic is easy to miss: the second condition, the snippet. Google lets site owners control how much of a page shows in results, and the AI features page itself names nosnippet, data-nosnippet, max-snippet and noindex as the ways to do it. The catch is that these settings don't stop at classic results.

Google's robots meta tag specification says nosnippet applies to every form of search result, from web search, Images and Discover to AI Overviews and AI Mode, and that it also stops the content from being used as a direct input for AI Overviews and AI Mode. Cap the length with max-snippet and you cap how much can be used directly in AI features, too.

Settings that trim what Search shows, from narrowest to widest

  1. 01data-nosnippetPart of a pageWhat happensOnly the marked part stays out of snippets
  2. 02max-snippet:[number]Snippet lengthWhat happensLess of the page can be used directly in AI Overviews and AI Mode
  3. 03nosnippetThe whole page's snippetWhat happensNot used as a direct input for AI Overviews and AI Mode either
  4. 04noindexThe page itselfWhat happensDrops out of results, and with it the condition for being a supporting link
The further down, the less shows in AI features. Fine if you meant it. If someone added it long ago and forgot, now is the time to check.

Also worth knowing: these settings can only be read if crawlers can reach the page. Google explains that if robots.txt blocks crawling, rules like noindex can't be read either. Blocking access and removing a page work differently.

Open a tab now and give it three minutes. Load your most visited page, right-click an empty spot and choose "View page source." Then press Ctrl+F (Cmd+F on a Mac) and search for nosnippet, then noindex. If nothing turns up, you can relax for now. If something does, it's time to find out who added it and why.

One more thing. Impressions and clicks from AI features are counted in Search Console's Performance report under the "Web" search type, together with the rest of your search traffic. Keep that in mind when your numbers go up or down.

A 3-minute check for today

If your site is in Search Console, you can do this right now. If not, the second step alone is enough.

  1. 1 min · IndexInspect your most important pagePaste the page address into the search bar at the top of Search Console to get the URL Inspection result. If it says "URL is on Google," the first condition is met. Being on Google still doesn't guarantee it will show.
  2. 1 min · SnippetCheck the description in resultsSearch Google for the page's title and find your result. See whether a description sits under the title. If it's empty, start with the settings above.
  3. 1 min · TrendRead the Performance report under "Web"Set the search type to "Web" and look at how clicks and impressions move. Traffic from AI features is counted here too.

Where doing this by hand gets stuck

One page is easy. But your site keeps growing, and URL Inspection has a daily limit per property. Open pages one at a time and you end up checking a few important ones and stopping there. Looking good on Google doesn't guarantee you'll appear the same way in ChatGPT or Gemini answers either, so you'd have to ask them separately, with different questions on different days.

AIOudit takes that part off your hands. Paste a page URL and it looks at how customers and AI read that page in one pass, then lays out what to fix first, in order.

Dit in its default look: a white body, a dark visor and headsets on both sides
DIT "Years of building your site. For the price of a coffee, Dit shows you how AI reads it."
Dit, the robot that reads signals. Dit checks first whether the signal you sent reached AI.

That said, Google decides which searches get an AI Overview and which pages it picks as sources. Price, ads and brand reputation sit outside the page too, and AIOudit can't see those for you.

See how customers and AI read your page. Run it through AIOudit.

Sources

  1. Google Search Central · AI features and your website (updated 2025-12-10: no additional requirements or special optimizations; no new machine-readable files, AI text files or markup needed; indexing and snippet conditions; SEO basics; counted under "Web" in Search Console)
  2. Google Search Central · In-depth guide to how Google Search works (updated 2025-12-18: crawling, indexing and serving; no payment to crawl more often or rank higher)
  3. Google Search Central · Google Search technical requirements (updated 2025-12-18: it costs nothing to appear in search results)
  4. Google Search Central · Robots meta tag, data-nosnippet, and X-Robots-Tag specifications (updated 2026-03-24: nosnippet and max-snippet apply to AI Overviews and AI Mode; rules can't be read if crawling is blocked)
  5. Search Console Help · URL Inspection tool ("URL is on Google" doesn't guarantee appearance; daily inspection limit per property) · checked 2026-11
  6. Google Blog · Q2 2026 earnings call: Remarks from our CEO (2026-07-22: AI Mode over 1 billion monthly active users; billions of clicks a week through AI features)
  7. Google Blog · Q3 2026 earnings call: Remarks from our CEO (2026-10-28: AI Mode queries three times longer on average)