What is generative engine optimization (GEO)?
How AI assistants choose which sources to cite, and what you can change.
On this page
Short answer
An AI citation is a link that an assistant attaches to its answer to show where a statement came from. For a business it works like a search result inside the answer: a reader who wants proof or detail clicks through to the cited page. A citation and a mention are different things. An assistant can name your brand without linking to you, or link your guide while recommending a competitor.
How assistants show their sources
Each product shows sources its own way, and some only when they searched the web for that answer.
| Assistant | When sources appear | What the vendor says |
|---|---|---|
| Google AI Overviews and AI Mode | with the AI answer on the results page | Google’s documentation on AI features says they show a broad set of supporting links, and that a page must be indexed and eligible for a snippet to be one of them |
| Perplexity | on every answer | Perplexity’s help center says each answer carries numbered citations that link to the original sources |
| ChatGPT | when the reply used web search | OpenAI’s developer documentation says the model decides whether to search based on the prompt, and that apps showing web results must make inline citations visible and clickable |
So in ChatGPT a reply without links may come from the model’s memory, while in Perplexity sources are part of every answer. When you test, note which mode produced the reply.
Read is not the same as cited
OpenAI’s web search documentation keeps two lists apart. One holds the citations placed in the text. The other, called sources, holds every URL the model looked at while writing the reply. That second list is longer. Google’s Gemini API documentation works in a similar way: each citation is tied to a specific span of the answer text.
The practical lesson: being found is step one. To get the link, your page needs a sentence the model wants to lean on for a particular claim. That is usually a short definition, a number with its context, a price range, a step in a process, or a clear comparison.
What it means for a service business
Buyers ask assistants things like “how much does X cost in my city”, “what is the difference between A and B” or “how long does it take”. The citation goes to a page that answers in plain words, close to the top, without making the reader scroll past a hero banner and three slogans.
We tested this on our own site, aoe.kz, with Russian-language queries in Almaty. On September 22, 2026, Google AI Overviews linked to it in 0 of 17 tracked queries. On October 6 it was 2 of 20, after three queries were added to the set. The pages that got links had been rewritten so that the first paragraph answers the question, with a table and a block of questions below. For “local SEO” the link showed up a week after the page was rewritten and was gone a week after that. Citations come and go, so a single good screenshot proves little.
In the same period the number of times ChatGPT named us did not grow. A Google citation and a chat mention are separate results, and we track them separately.
Each product shows sources its own way, and some only when they searched the web for that answer.
How we check citations
- Write down 10 to 30 questions that real buyers ask, in their wording.
- Run each one in Google, Perplexity and ChatGPT with search on, from the same location. Repeat each run at least three times, since answers change between runs.
- For every answer, record three things: were you named, were you linked, and which URL.
- Where you are linked, find the sentence on your page that the answer relies on.
- Where a competitor is linked, open that page and note what it states that yours does not.
- Repeat the same set every month. We measured our own site weekly.
| What you find | What it usually means | Next step |
|---|---|---|
| Named, not linked | the assistant knows you from other sources | give the topic a page with a direct answer |
| Linked, not named | your page explains the topic, but a rival is recommended | add your own offer and facts next to the explanation |
| Neither, rival linked | the rival answers the question more plainly | compare the first paragraphs side by side |
| Wrong URL linked | an old or weaker page covers the topic | update it or send it to the current page |
You can run a free check with us if you want a first table without setting this up yourself.
What to fix on the page
- Answer first. Put the answer in the first two sentences, written so it still makes sense when quoted alone.
- Facts as text. Prices, service areas and timelines in plain text, not inside images or sliders.
- One topic per page. When three services share a page, the assistant may cite a rival’s focused page instead.
- Snippet eligibility. A nosnippet rule or a noindex tag removes the page from Google’s pool of supporting links.
- Search bots allowed. OpenAI’s crawler documentation says sites that opt out of OAI-SearchBot will not be shown in ChatGPT search answers, and that robots.txt changes take about 24 hours to apply.
- Your own sources. When you state a number, say where it comes from. A page that cites its sources is easier to cite.
The layout side is covered in more depth in our AEO checklist.
Common mistakes
- Counting once. One run on one day shows nothing. Use repeated runs on a fixed question set.
- Mixing two metrics. Mentions and citations move for different reasons. Report them in separate columns.
- Blanket bot blocks. A robots.txt rule copied from a forum can block the search bots of AI assistants along with training bots.
- Waiting for traffic. Pew Research Center tracked 900 US adults in March 2025 and found that people clicked a link inside Google’s AI summary in 1% of visits to results pages that had one. A citation is worth more as proof and visibility than as a traffic source.
Write down 10 to 30 questions that real buyers ask, in their wording.
FAQ
What is the difference between a mention and a citation?
A mention is your brand name in the answer text. A citation is a link to one of your pages as a source. You can have either one without the other, which is why we track both.
Can we pay to be cited?
We know of no way to buy a citation in an organic AI answer. Google’s documentation lists no extra requirement for AI Overviews beyond being indexed and eligible for a snippet.
How fast can a page get cited?
On our site, two pages were linked 1 and 7 days after their rewrite (we check weekly, so the true delay may be shorter). That is two queries in one market, so take it as an example, not a promise.
Where can I read more?
Our GEO guide covers how assistants choose sources, the grounding guide explains why answers with search show links, and the AI search glossary has short definitions.
