What is AI search optimization?

AI search optimization (GEO, Generative Engine Optimization) means getting ChatGPT, Gemini, Perplexity and Google AI Overviews to understand your website, so they cite you and recommend you when they answer customers' questions. The first half of this page is for business owners: five minutes on how AI reads a website differently from people. The second half is the research and checklist for marketers and engineers.

What is AI search optimization, in one sentence?

Writing your website so AI can understand it and is willing to cite it, so that when customers ask AI, you're in the answer.

Customers used to search on Google, see a list of links, and click through to compare for themselves. Now more and more people simply ask AI: "Which factories in Taichung do small-batch custom machining?" AI reads through each company's website, sums them up in one answer, and names only a few. Customers often choose from those few.

The problem is that AI reads a website differently from people:

• People look at images and design; AI mainly reads text. Slogans set as images and explanations that only appear in videos may well be invisible to AI.
• People will flip through several pages to find something; AI looks for a passage it can quote directly. If the answer is buried in the middle of a long introduction, AI has a hard time using it.
• People trust a good-looking website; AI looks for facts it can check. The clearer your full company name, address, contact details, who wrote the content and when it was updated, the more willing AI is to cite you.

Same question: whom does AI cite?

AI cites the websites that write the answer clearly, not necessarily the best-known one or the one that ranks highest.

The three companies may be equally capable. The difference is that A and B wrote what customers want to know as sentences AI can quote directly, while a line like "Quality first, professional service" can't be used by AI to answer any specific question.

How is AI search optimization different from SEO?

SEO puts you near the top of search results; AI search optimization gets AI to say your name in its answer. The two don't conflict.

Websites that do AI search optimization well usually benefit in Google search too, because both favor websites with clear content and complete information. To find out whether AI can read your website today, enter your URL and see a score in 60 seconds.

For marketers and developers

Why does GEO work? Which nine strategies did the Princeton study test?

Adding quotations, adding statistics and citing authoritative sources do the most to raise the chance that content is cited by AI; the keyword stuffing common in traditional SEO actually backfires.

Aggarwal et al. (KDD 2024) tested 9 optimization methods on the GEO-bench benchmark, measuring effect by how visible content was in AI answers: quotations +41%, statistics +33%, sources +30%, fluency +28%, while keyword stuffing came in at -10%. GEO isn't guesswork; it's a method that can be measured and verified.

1. Quotation Addition (add credible quotations)
2. Statistics Addition (add quantitative data)
3. Cite Sources (cite authoritative sources)
4. Fluency Optimization (improve how fluently the text reads)
5. Technical Terms (add domain terminology)
6. Easy-to-Understand (simplify the language)
7. Authoritative (use an authoritative tone)
8. Unique Words (add distinctive wording)
9. Keyword Stuffing (a negative indicator)

Source: Aggarwal et al., “GEO: Generative Engine Optimization,” KDD 2024 — arXiv:2311.09735. For the full breakdown and data on all nine strategies, see this article.

How do GEO, AEO, AI SEO, LLMO differ?

The short answer: they describe the same thing.

These four terms describe one goal from different angles: raising a website's AI search visibility and AI citation rate, so that ChatGPT, Gemini, Perplexity and Google AI Overviews can find your content, understand it, and are willing to quote it directly. They differ only in what they emphasize.

GEO

Generative Engine Optimization (also called generative search optimization). It centers on generative engines, has the broadest scope, and is the term this site uses; in English we call it "AI search optimization".

AEO

Answer Engine Optimization. It emphasizes "being used as the answer", focusing on question-and-answer structure and passages that can be quoted directly.

AI SEO

AI search engine optimization. A term that starts from existing SEO and treats AI search as a new channel that needs its own effort.

LLMO

Large Language Model Optimization. It centers on the model itself, focusing on how content is read and restated by large language models.

Which 8 checkpoints show whether your website meets GEO?

The first four confirm that AI crawlers can reach your content; the last four confirm that AI can understand it and is willing to cite it.

Technical foundations: can crawlers reach it?

• robots.txt doesn't block AI crawlers

  Make sure OAI-SearchBot, ClaudeBot, PerplexityBot and GPTBot aren't blocked by robots.txt, and that key content paths aren't mistakenly set to Disallow.

• Sitemap kept current and complete

  Newly published or heavily rewritten pages should go into sitemap.xml promptly so AI crawlers don't miss them; keep the lastmod tags as well.

• Important pages aren't buried too deep

  Keep the click path from the homepage to core service pages within 3 levels; pages that sit too deep are hard for AI crawlers to discover.

• canonical and duplicate content handled cleanly

  Each page points to exactly one canonical, so pagination and tracking parameters don't create multiple versions of the same content that split its weight.

Content and structure: can AI understand it, and will it cite it?

• Use real questions as H1/H2 headings

  Write the questions users would ask out loud directly as section headings (for example, "How is GEO different from SEO?"), so AI can more easily match the section to the user's question.

• Short paragraphs that lead with the answer

  Each paragraph focuses on one idea and ends within 3–5 sentences, with the core conclusion in the first sentence, so AI can pick out the summary sentence.

• One page, one core topic

  Don't mix service descriptions, case studies, pricing and technical details on one page; a scattered topic leaves AI unsure which search intent the page belongs to.

• Basic SEO still boosts GEO

  Steady Google indexing speed and rankings in themselves help AI discover new content faster; GEO doesn't replace SEO, it stands on SEO's shoulders.

To see how many of these your website meets in one go: the GEO Health Check scores five dimensions across 18 checks, and you can see what's in the report first.

What are common questions about AI search optimization?