Anyone searching what is generative engine optimization (GEO) has probably noticed that more questions are now answered by AI tools that write a response instead of showing ten links. GEO is the work of being one of the sources those tools use. The term is recent, the underlying systems change often and the field attracts bold claims, so this guide sticks to what is documented: where the idea came from, how these engines assemble an answer and which parts of a website and reputation they depend on.
Where the term came from
The name comes from a 2023 research paper by Pranjal Aggarwal and colleagues, published on arXiv as "GEO: Generative Engine Optimization". The authors defined generative engines as systems that retrieve information and generate a synthesized answer, and they tested which changes to source content made it more visible in those answers. Methods such as adding citations to credible sources, quotations and statistics performed better in their experiments than keyword stuffing. The paper is a useful starting point, though it was a controlled study and commercial engines have changed since.
What is generative engine optimization (GEO) compared with SEO
SEO aims for a ranked listing that a person clicks. GEO aims for inclusion in an answer the engine writes. The page qualities overlap a great deal, and we lay out the boundaries in SEO vs GEO vs AEO. The main shift is in the unit of success: being mentioned or linked as a source inside a paragraph, rather than holding a position on a list.
How a generative engine builds an answer
Implementations differ, but most AI search products follow a similar sequence:
- Interpret the question and often split it into several searches.
- Retrieve candidate pages from a search index, either their own or a partner's.
- Read and select passages that answer each part of the question.
- Write a combined answer, drawing on those passages and on what the model learned in training.
- Attach citations to some or all of the sources, depending on the product.
Two practical points follow. A page must be retrievable, which brings us back to crawling and indexing. And its passages must be easy to lift, which is the territory of answer engine optimization.
Which crawlers matter
Access settings in robots.txt decide which AI systems can read your pages. These are the user agents most often confused:
| Crawler | Operated by | What it is documented for |
|---|---|---|
| Googlebot | Google Search, including AI Overviews and AI Mode | |
| Google-Extended | A control token for use in Gemini models; it does not affect Google Search | |
| Bingbot | Microsoft | Bing search, which also supports Copilot answers |
| OAI-SearchBot | OpenAI | Surfacing sites in ChatGPT search results |
| GPTBot | OpenAI | Collecting content that may be used to train models |
| PerplexityBot | Perplexity | Indexing sites for Perplexity answers |
Blocking a training crawler and blocking a search crawler are different decisions, and many sites block the wrong one by copying a generic robots.txt.
What GEO changes in day to day work
- Facts stated plainly. Services, locations, specifications and limits written as clear sentences, not buried in design.
- Sources cited. Claims linked to standards, regulators or original research.
- Consistent brand description. The same name, category and details on your site, profiles, directories and press mentions, since models learn about you from third party pages too.
- Measurement by sampling. A fixed set of prompts checked regularly, plus referral visits from AI platforms in analytics.
What GEO cannot promise
Any explanation of what is generative engine optimization (GEO) should include its limits: no one controls what an AI system writes. Answers vary between sessions and users, providers change their retrieval systems without notice and some products cite few sources. Any offer of guaranteed AI recommendations should be read with caution. Honest GEO work improves the conditions for being cited and reports what it can and cannot see.
If what is generative engine optimization (GEO) was your question, the answer in practice is SEO done with AI answers in mind. You can see how we deliver it in our generative engine optimization services, or talk to Busca Orgânica to review how AI tools describe your business today.