--- title: "Generative Engine Optimization (GEO): A Practical Guide" description: "Generative engine optimization (GEO) explained: where the term comes from, what the research measured, and how a business gets cited in AI answers." url: https://www.llmreach.ai/guides/geo updated: 2026-11-02 publisher: LLMReach, a US-based SEO and GEO agency --- > LLMReach is a US-based SEO and GEO agency that gets brands ranked in Google and cited by ChatGPT, Claude, Perplexity and Gemini. GEO # What is generative engine optimization? A plain guide to GEO. What is GEO, where the term comes from, what the research measured, and the steps a business takes to be cited in the answers AI assistants write. Short answer ## What is generative engine optimization (GEO)? Generative engine optimization makes your brand easy for AI assistants to cite and recommend. Think ChatGPT, Gemini, Perplexity and Google's AI Overviews. The goal is to be named inside the answer, not only ranked. In brief ## Five things to know first. * ### GEO stands for generative engine optimization It is the work of being cited in answers that AI systems synthesize from several sources. * ### The term is academic It was introduced in a paper first submitted to arXiv on 16 November 2023 and accepted to KDD 2024. * ### Assistants cite, they do not rank Buyers get one answer with a few sources. A brand that is not cited is not considered. * ### Google keeps the basics Google says [SEO best practices stay relevant](https://www.llmreach.ai/guides/ai-seo) and that its AI features have no additional technical requirements. * ### You measure citations Track mentions and citations across agreed buyer questions, against a baseline taken before work starts. The definition ## GEO stands for generative engine optimization. Generative engines synthesize information from several sources and summarize it with large language models. GEO is the work of making your content visible in those answers. In marketing, GEO means being named and cited where buyers now ask their questions: ChatGPT, Claude, Perplexity and Gemini. * ### Generative engine A system that gathers sources and writes one answer with a language model. * ### Optimization Changes to your pages and presence that make them easier to retrieve and cite. * ### The goal A mention or a citation inside the answer, not a position in a list. * ### The same idea, other names Generative search optimization and AI GEO describe this same work. Where it comes from ## The research behind the term. The term appeared in a paper by Pranjal Aggarwal and five co-authors, first submitted to arXiv on 16 November 2023 and last revised on 28 June 2024\. It was accepted to KDD 2024. The authors built GEO-bench, a large benchmark of user queries across domains, to test strategies systematically. __The GEO research paper at a glance__ | Item | Detail | | --------------- | ----------------------------------------- | | First submitted | 16 November 2023 (arXiv:2311.09735) | | Latest version | v3, revised 28 June 2024 | | Conference | KDD 2024 | | Benchmark | GEO-bench: diverse queries across domains | | Key finding | Strategy efficacy varies across domains | How it works ## How AI assistants pick their sources. ChatGPT decides on its own whether to search the web. It typically rewrites your question into targeted queries before sending them to search partners, and answers can include source links. Perplexity searches in real time and attaches numbered citations to every answer. Google uses its core ranking systems to retrieve pages for AI responses and may fan a question out into related queries. Engine by engine, start with [Perplexity SEO](https://www.llmreach.ai/ai-search/perplexity-seo). 1. ### A buyer asks a question The assistant decides whether it needs fresh information from the web. 2. ### The question is rewritten ChatGPT turns it into targeted queries. Google may fan it out into related ones. 3. ### Sources are retrieved Crawlers such as OAI-SearchBot and PerplexityBot supply the pages the engines can use. 4. ### One answer is written The model summarizes the sources and cites a few of them with links. Want to see your AI visibility today? We run your buyer prompts through ChatGPT, Claude, Perplexity and Gemini and show where you appear and who is named instead. [Get your free AI audit](https://www.llmreach.ai/guides/geo#book) Why it matters ## If AI doesn't cite you, it skips you. Assistants return one answer with a few sources, not ten links. Rivals named for your category take the shortlist before a buyer reaches your site. Strong rankings do not settle this. In our October 2026 test of [249 buyer questions](https://www.llmreach.ai/research/where-does-ai-get-its-information), only 13% of the sites the assistants cited ranked in Google's top 10 for the same question. 13% Citations reach lower-ranked pages [LLMReach measurement, October 2026](https://www.llmreach.ai) GEO examples ## GEO examples from our own data. These GEO examples come from [LLMReach's own measurement](https://www.llmreach.ai/research/where-does-ai-get-its-information): ChatGPT, Gemini and Perplexity answering the same [New York buyer questions](https://www.llmreach.ai/locations/new-york) in October 2026. The businesses all three assistants name show up on the pages those assistants read: their own site, rankings, comparison sites and trusted directories. LLMReach does this work for its own brand first: in September 2026, ChatGPT and Gemini both named LLMReach for "best agency for getting cited in LLMs". __GEO examples: what three AI assistants answered in New York (LLMReach measurement, October 2026)__ | Buyer question | Named by all three | Sites they cited | What it shows | | -------------------------------------------------------- | ------------------------------------------------------------- | ------------------------------------------ | -------------------------------------------------- | | Best hospital in New York for heart surgery | NYU Langone, Mount Sinai, NewYork-Presbyterian (3 of 5 named) | Each hospital's own site, US News | Clear specialist pages on your own site get cited. | | Cheapest renters insurance in New York | Lemonade, State Farm, NYCM (3 of 6) | NerdWallet, ValuePenguin, Insuranceopedia | Comparison sites decide price questions. | | Best boutique hotel in New York for a weekend trip | The Bowery Hotel (1 of 13) | Time Out, Condé Nast Traveler, Tripadvisor | Editorial lists shape travel answers. | | Best divorce lawyer in New York for a high-asset divorce | None (0 of 15) | Super Lawyers, Chambers, Avvo | No firm owns this answer yet: an open opening. | Google's view ## What Google says about GEO. Google says normal SEO best practices still apply to its AI features. To appear as a supporting link, your page must be indexed and eligible for a snippet. Google also says terms like [AEO](https://www.llmreach.ai/guides/aeo) and GEO are common online, but that many suggested hacks are not effective or supported by how Search works. | | Google says you need | Google says you do not need | | ---------------- | ------------------------------------------- | --------------------------------------- | | Pages | Indexed and eligible to show with a snippet | Content chunked into tiny pieces | | Content | Unique, compelling, useful content | A rewrite for every long-tail variation | | Files and markup | Standard Search technical requirements | llms.txt or special AI files and markup | | Structured data | It helps for rich results | Special schema.org markup for AI search | Ready to start the work? The free audit gives you a baseline, a prompt-level gap map and a prioritized 90-day roadmap. You keep the data either way. [Free AI Audit](https://www.llmreach.ai/guides/geo#book) What to do ## How to do GEO, step by step. GEO optimization starts with the prompts your buyers use and ends with citations you can measure. This is the roadmap we follow at LLMReach, which we call the Citation Stack. If you would rather hire than build, see the [best GEO agencies](https://www.llmreach.ai/best-agencies/geo). 1. ### Research the buyer prompts Identify the questions buyers ask before they decide, and agree them before work begins. 2. ### Fix technical access Let AI crawlers reach and read your key pages: robots.txt, rendering, schema and entity signals. 3. ### Write answer-first pages Give assistants specific facts they can quote, built for the agreed prompts. 4. ### Build presence off your site Earn genuine presence in the communities and sources buyers trust. No spam, no automation. 5. ### Track against a baseline Measure citations across the agreed prompts, with a baseline taken before any work starts. Measure it ## How to measure a GEO program. There is no Search Console for ChatGPT answers. Answers change by platform, prompt and week, so you track a fixed set of buyer questions on a schedule. Keep the metrics apart. A brand can be mentioned without its site being cited, and a single score hides the gap that needs action. __What an AI visibility audit measures__ | Metric | What it tells you | | ---------------------- | ------------------------------------- | | Visibility | How often you appear in answers | | Mentions | Where your brand is named in text | | Citations | Where your pages are used as a source | | Share of voice | Your share against competitors | | Position and sentiment | Where and how you are described | Common mistakes ## Mistakes that stall GEO. Most stalled programs share a few causes. Fix the cause before adding tactics. * ### Blocking the crawlers Sites opted out of OAI-SearchBot will not be shown in ChatGPT search answers. * ### Writing to rank, not to be quoted Pages with nothing specific to repeat leave the assistant nothing to cite. * ### Mass pages for every variation Google says doing this to manipulate AI responses violates its scaled content abuse policy. * ### Treating citations as a guarantee OpenAI says ChatGPT placement is not assured, and results can be incomplete or incorrect. * ### Skipping the baseline Without one, you cannot tell whether any change worked. FAQ ## GEO: common questions. ### What does GEO stand for? GEO stands for generative engine optimization. The term comes from a 2023 research paper by Aggarwal and co-authors, accepted to KDD 2024\. It describes optimizing content so it appears in the answers that generative engines write from several sources. ### What is GEO in marketing? GEO in marketing is the work of getting your brand mentioned and cited in AI-written answers. Marketers plan it around the questions buyers ask assistants, then measure mentions and citations against a baseline rather than watching a keyword ranking. ### What are some GEO examples? In LLMReach's October 2026 measurement, all three assistants named NYU Langone, Mount Sinai and NewYork-Presbyterian for heart surgery in New York, each cited from its own pages. For high-asset divorce lawyers, no firm was named by all three. That gap is the opening [GEO work](https://www.llmreach.ai/ai-search/geo-agency) targets. ### Is GEO the same as AEO or generative search optimization? The names overlap. AEO began with featured snippets and voice answers; GEO comes from the 2023 paper on generative engines. Generative search optimization describes the same goal. In practice, the same work serves both: pages written to be cited. ### Does GEO replace SEO? No. Google says SEO best practices remain relevant because its generative AI features are rooted in its core Search ranking and quality systems. GEO adds work outside your own pages and measurement of citations in each assistant. ### Do I need an llms.txt file for GEO? Google says its Search, including its generative AI features, does not use llms.txt or other special AI files, so you don't need one for Google. LLMReach includes llms.txt in its technical work as one signal among several. ### Can anyone promise AI citations? No assistant assures placement. OpenAI says ChatGPT ranks results using multiple factors and that placement is not assured. A GEO program diagnoses gaps and sets a baseline; judge any promise by what is measured against that baseline. ### How long does a GEO program take? LLMReach runs its engagement in a 90-day window, with a baseline taken before work begins, weekly updates and a review every two weeks. Expect to set the baseline first, then read changes against it rather than expecting results in a few weeks. Free AI Audit ## Find out where you stand in AI answers. You leave knowing where the gap is, what is causing it, and which changes would matter first, whether we work together or not. What to expect 1. Audit Before the call, we run your buyers' questions through ChatGPT, Claude, Perplexity and Gemini. 2. Map On the call, we show you where competitors are cited and you are not, and what's causing it. 3. Decide An honest read on whether the Citation Stack fits. If it doesn't, you'll hear it on the call. Don't see a time that works? Email Karim directly: [contact@llmreach.ai](mailto:contact@llmreach.ai) --- Source: https://www.llmreach.ai/guides/geo Free AI audit: https://www.llmreach.ai/#book - Our research: https://www.llmreach.ai/research - AI search statistics: https://www.llmreach.ai/ai-search-statistics