Search foundations first, generation second
Google describes AI Overviews and AI Mode as Search features that surface relevant links and may use query fan-out across subtopics and data sources. There are no additional technical requirements or special AI markup needed to appear; the ordinary Search foundations still apply.
That keeps the optimization target simple. Make the page crawlable, internally discoverable, useful, and available in textual form; keep structured data consistent with visible content. Google can then decide whether the page is useful as a supporting link for a particular response.
| Stage | What decides it |
|---|---|
| Indexing | Crawlable, renderable, judged worth storing |
| Retrieval | Relevance to the fanned-out queries |
| Generation | What the retrieved passages actually say |
| Citation | Which passages the answer leaned on |
Query fan-out
Google says AI Overviews and AI Mode may use query fan-out: multiple related searches across subtopics and data sources. That means the links in an AI response do not have to mirror the classic results for the exact wording the user typed.
This helps explain why a page can perform well for an exact query yet be absent from an AI response without implying a technical failure. The response may draw on related searches and supporting pages selected for different parts of the topic.
The practical consequence is not to manufacture every possible phrase. Cover the subject as completely as the user needs, using natural terminology, so the page can be relevant to the meaningful subtopics rather than optimized for one exact string.
No separate file to publish
Google says directly that you do not need new machine-readable files, AI text files, markup or Markdown versions, and that llms.txt is ignored by Search. The entry requirement is the ordinary one, which is why AI visibility work keeps collapsing back into SEO work.
| Proposed tactic | Status |
|---|---|
| llms.txt | Ignored by Google Search |
| A Markdown copy of each page | Not required |
| AI-specific markup or meta tags | None exist for this |
| Content pre-chunked for machines | Not required by Google Search |
| A second version written for models | Cloaking; a spam-policy violation |
It is worth being clear about why these keep appearing despite being ruled out. Each is cheap to implement, impossible to disprove from your own data, and arrives during a period when nobody wants to be the team that did nothing. That combination produces adoption regardless of evidence.
What actually changes, and what does not
Treating AI search as entirely new leads to wasted work; treating it as entirely unchanged misses two things that genuinely differ.
- The unit of success changes. A citation is binary and varies between runs, so a single observation is not a measurement.
- The searches used can change. Fan-out means supporting links may be found through related subtopic searches rather than the exact typed query.
- The technical foundation stays familiar. Google says the same fundamental SEO practices remain relevant and no special AI markup is required.
- The writing goal stays people-first. Clear, specific text helps readers and gives Search useful material without inventing a separate machine-facing version.
Where to look when you are not appearing
Because the pipeline has distinct stages, absence has distinct causes, and they are worth separating before changing anything.
- Confirm the page is indexed. If it is not, nothing downstream can happen and the rest of this list is moot.
- Review Search preview controls such as nosnippet, data-nosnippet and max-snippet if you intentionally limit what Google may show.
- Confirm Googlebot is allowed by robots.txt and by your CDN or hosting layer; Googlebot is the crawler control for Google's AI Search features.
- Search the subtopics the question implies, not the question itself, and see whether you rank for those.
- Read your own opening passage and ask whether it answers anything a model could lift out intact.
Only the last step is about writing, and it is the one people start with. The first four are ordinary technical checks, and they account for most cases of a page that never appears in generated answers at all.