Generative engine optimization (GEO) is the practice of making your website easy for AI search engines such as ChatGPT, Perplexity, Microsoft Copilot and Google AI Overviews to find, understand and cite in their answers. It matters now because OpenAI says ChatGPT search already handles about 20% of Google’s search volume, and that share is growing fast.
What is generative engine optimization?
Traditional search shows a list of links. AI search writes an answer and cites a few sources inside it. Generative engine optimization is the work that makes your website one of those sources. The term comes from a 2023 research paper by a team from Princeton University and partners, “GEO: Generative Engine Optimization”, which found that clear structure, cited facts and quotable statements can raise a source’s visibility in AI answers by up to 40%.
Generative engine optimization has two parts. The technical part makes sure AI crawlers can reach and read your pages. The content part makes sure your pages answer real questions clearly enough to be quoted.
Key terms used in this guide
- AI search engine: a tool that answers questions in its own words and cites web sources, such as ChatGPT search, Perplexity, Microsoft Copilot and Google AI Overviews.
- Generative engine optimization (GEO): optimizing a website so AI search engines find, understand and cite it.
- Answer engine optimization (AEO): structuring content so it supplies the direct answer to a question, such as a featured snippet or voice answer.
- Search engine optimization (SEO): optimizing a website to rank in traditional search results such as Google and Bing.
- AI crawler: an automated program that visits websites for an AI company. OpenAI runs OAI-SearchBot for ChatGPT search and GPTBot for model training.
- Schema markup (also called structured data): code that labels the facts on a page, such as your business name, address, services and FAQs, so machines can read them without guessing.
- llms.txt: a proposed plain-text file that gives AI tools a short map of a website’s most important pages.
- AI search readiness audit: The X Concept’s review of a website against the factors in this guide.
ChatGPT search is now about 20% of Google
In early November 2026, ChatGPT consumer product lead Adam Fry told Alex Kantrowitz of Big Technology that ChatGPT’s search volume is about 20% of Google’s, or “roughly one-fifth.” Fry also said ChatGPT grew from 1 billion to 1.2 billion weekly active users in about 60 days.
Three details from the interview matter for any business with a website:
- Search is new to ChatGPT. ChatGPT search launched about a year and a half ago. Before that, ChatGPT could not look up current information.
- People now use ChatGPT the way they used Google. Fry said usage has expanded from writing and coding help to looking up people, places and things.
- High-stakes questions trigger a web search. Finance and health questions are a major category, and ChatGPT searches the web to answer them with current facts. Legal, medical and financial services firms should take note.
Keep in mind that these are OpenAI’s own figures. OpenAI has not published how it counts a search, so treat 20% as a direction rather than a precise measurement. The direction is clear either way.
“Google isn’t going away, but 20% of Google’s use and the way it is growing is too big to ignore.” – Charles Oreve, founder of The X Concept
How generative engine optimization differs from SEO and AEO
Search engine optimization, answer engine optimization and generative engine optimization are not competing strategies. They stack:
- Search engine optimization earns a position in a list of links. Success is a click.
- Answer engine optimization earns the single answer to one question. Success is being the snippet.
- Generative engine optimization earns a citation inside an answer the AI search engine writes. Success is being named and linked as a source.
AI search engines still depend on search indexes, crawlable pages and trustworthy content, so a website with weak search engine optimization rarely does well in AI search. Generative engine optimization adds a layer on top of the foundation.
How to make your website compatible with AI search engines
These are the checks The X Concept runs in an AI search readiness audit.
1. Let AI crawlers in
Check your robots.txt file for OpenAI’s crawlers. According to OpenAI’s crawler documentation, OAI-SearchBot decides whether your website can appear in ChatGPT search answers, and blocking it removes you from those answers. GPTBot is separate and only covers model training, so you can block GPTBot and still allow OAI-SearchBot. Also check your firewall, security plugin or Cloudflare settings. Bot protection often blocks AI crawlers even when robots.txt allows them.
2. Get indexed by Bing
ChatGPT search draws on third-party search providers, including Microsoft Bing, and Copilot runs on Bing. Many businesses verify their website in Google Search Console and never touch Bing. Verify your website in Bing Webmaster Tools, submit your sitemap, and turn on IndexNow so new and updated pages are reported to Bing right away.
3. Add schema markup
Schema markup tells AI search engines exactly who you are, where you are, what you offer and which questions you answer. At a minimum, add Organization or LocalBusiness, Service, FAQPage and Article markup, and keep it consistent with the visible text on the page.
4. Publish an llms.txt file
An llms.txt file gives AI tools a short, plain-language map of your most important pages. It is still a proposed standard, and the major AI search engines have not confirmed they use it, so treat it as a low-cost extra rather than a guarantee.
5. Serve real content in the HTML
Many AI crawlers do not run JavaScript the way a browser does. If your services, prices or answers only appear after scripts load, AI search engines may see an empty page. Make sure important content is rendered on the server, and keep pages fast so crawlers can read your whole website.
6. Structure content as questions and answers
AI search engines quote sentences that answer a question on their own. Use question-style headings, start each section with a direct one- or two-sentence answer, define your terms once and use them consistently, and back claims with sources and specific numbers. These are the same habits that help answer engine optimization.
7. Measure AI referral traffic
In Google Analytics 4, watch referrals from chatgpt.com, perplexity.ai, copilot.microsoft.com and gemini.google.com. AI referral traffic is small for most businesses today, which is exactly why now is the time to build the baseline. At The X Concept, we also review each page in WordPress against a generative engine optimization checklist: one primary question, a clear definition, consistent terms and an up-to-date fact review date.
Get an AI search readiness audit
The X Concept includes an AI search readiness audit in its SEO, AEO and GEO plans. We check every item in this guide on your website, fix what is blocking AI search engines, and set up the tracking to see the results.
The fastest way to start is a call. Schedule a call with The X Concept and we will tell you where your website stands with ChatGPT, Perplexity, Copilot and Google, and what to fix first.
Frequently asked questions about generative engine optimization
How big is ChatGPT search compared to Google?
According to OpenAI, ChatGPT’s search volume is about 20% of Google’s, roughly one-fifth. ChatGPT consumer product lead Adam Fry shared the figure in November 2026, along with 1.2 billion weekly active users. These are OpenAI’s own numbers, and OpenAI has not published how it counts a search.
What is the difference between SEO, AEO and GEO?
Search engine optimization (SEO) helps a page rank in traditional search results. Answer engine optimization (AEO) helps a page supply the direct answer to a question, such as a featured snippet or voice answer. Generative engine optimization (GEO) helps a page get found, understood and cited by AI search engines such as ChatGPT, Perplexity, Copilot and Google AI Overviews. The three overlap, and a well-built website supports all of them.
Does blocking GPTBot remove my website from ChatGPT search?
No. OpenAI uses separate crawlers. GPTBot collects content that may be used to train OpenAI’s models, while OAI-SearchBot decides whether your website can appear in ChatGPT search. You can block GPTBot and still allow OAI-SearchBot.
Do I still need SEO if I invest in generative engine optimization?
Yes. Google remains the largest search engine, and AI search engines rely on the same foundations as SEO: crawlable pages, a fast website, accurate content and a search index. Generative engine optimization builds on SEO rather than replacing it.
What is an AI search readiness audit?
An AI search readiness audit is a review of your website against the technical and content factors that decide whether AI search engines can crawl, understand and cite it, from robots.txt and firewall settings to schema markup and content structure. The X Concept includes the audit in its SEO, AEO and GEO plans.
