Search used to end with a list of links. Increasingly it ends with an answer: an AI Overview at the top of Google, a ChatGPT response, a Perplexity summary with footnotes. Those answers draw on web content, but only some sources get used, cited or named. Generative engine optimization is the effort to be one of them.
The term is often used loosely, and much advice about it is guesswork. This guide separates what is known from what is speculation: what the original research tested, what Google has said publicly, and what practitioners can do and measure. For our service offering, see generative engine optimization services. Sources are listed at the end.
What GEO means
Generative engines are systems that answer questions by retrieving information from multiple sources and summarising it with a large language model. GEO aims to improve three things:
- Inclusion: whether your content is used as a source for an answer.
- Citation: whether the answer links to or names your page or brand.
- Accuracy: whether the answer describes your brand, products and facts correctly.
Related terms include answer engine optimization (AEO), LLM SEO and AI search optimization. They describe largely the same goal from slightly different angles. See also our pages on answer engine optimization and LLM SEO.
What the original GEO research found
The term "generative engine optimization" was introduced in a 2023 paper by Pranjal Aggarwal and colleagues, later accepted at the KDD 2024 conference. The researchers built a benchmark of diverse queries and tested how editing source content changed its visibility in generated answers.
| Method tested | What it does | Result reported |
|---|---|---|
| Cite sources | Adds citations to credible sources | Among the top performers |
| Quotation addition | Adds relevant quotations from credible sources | Among the top performers |
| Statistics addition | Replaces qualitative claims with quantitative statistics where possible | Among the top performers |
| Fluency optimization | Improves the readability and fluency of text | Helped, less than the top methods |
| Keyword stuffing | Adds more query keywords, as in old-style SEO | Did not perform well |
The paper reports that the top methods (citing sources, adding quotations and adding statistics) achieved a relative improvement of 30 to 40% on its position-adjusted word count measure and 15 to 30% on a subjective impression measure. It also found that lower-ranked websites benefited more: citing sources produced a 115.1% visibility increase for websites ranked fifth in search results, while the visibility of the top-ranked website decreased by about 30% on average. The authors note that effectiveness varied by domain.
How to read these results
- The experiments used a research setup, not live production systems, so exact percentages will not transfer directly.
- The direction is useful: content that is specific, evidenced and quotable is more likely to be used in generated answers.
- The finding that keyword stuffing fails matches what search engines have long rewarded.
- The benefit for lower-ranked pages suggests that smaller sites can compete in AI answers by being more useful and better sourced.
What Google says about AI Overviews and AI Mode
Google's documentation on AI features and websites is clear and worth quoting accurately:
- SEO best practices remain relevant for AI features such as AI Overviews and AI Mode.
- There are no additional requirements to appear in them, nor special optimizations necessary.
- To be shown as a supporting link, a page must be indexed and eligible to be shown in Google Search with a snippet.
- You do not need to create new machine-readable files, AI text files or markup, and there is no special schema.org structured data required.
For Google, then, GEO is mostly good SEO: crawlable, indexable pages with helpful, reliable, people-first content. Other AI tools have their own retrieval systems, but most also depend on content that is accessible, clear and trusted.
How AI answer engines choose sources
| Factor | Why it matters |
|---|---|
| Retrievability | Content must be crawlable and indexed by the search systems the AI uses |
| Relevance to the question | Pages that directly answer the specific question are easier to use |
| Clarity and structure | Clear headings, direct answers and well-organised facts are easier to extract and summarise |
| Evidence | Statistics, citations and quotations make content more useful and credible to summarise |
| Authority and consistency | Brands and facts repeated consistently across trusted sources are more likely to be stated confidently |
| Freshness | For time-sensitive topics, recent content is preferred |
A practical GEO checklist
Content
- Answer the question directly near the top of the page, then expand.
- Use specific numbers, dates and named sources rather than vague claims.
- Cite credible sources and link to them.
- Include original data, examples or expert input that others do not have.
- Use clear headings that match the questions people ask.
- Write definitions, comparisons and steps in plain, quotable sentences.
- Keep facts about your company (founding date, locations, services, prices) consistent across your site.
- Update content when facts change, and show the update date.
Technical
- Make sure important pages are crawlable, indexable and eligible for snippets.
- Render key content in HTML rather than only through scripts.
- Keep pages fast and accessible.
- Use structured data where it accurately describes the page, for ordinary search features, knowing that Google does not require special markup for AI features.
- Decide deliberately whether to allow AI crawlers from other providers in robots.txt, understanding the trade-off between visibility and control.
Brand and off-site
- Earn mentions in reputable publications, industry sites and directories.
- Keep business listings, profiles and partner pages accurate.
- Encourage genuine reviews on trusted platforms.
- Contribute expertise to podcasts, interviews and industry reports.
- Correct inaccurate information about your brand where it appears.
Measuring AI visibility
Traditional rankings do not show whether AI answers mention you. A simple, repeatable test makes progress visible:
AI visibility scorecard
How to run the test
- Write 20 to 50 prompts your customers might ask, across problem, comparison and brand questions.
- Run them in the AI tools that matter for your market, such as Google AI Mode, ChatGPT, Perplexity, Copilot and Gemini.
- Record mentions, citations, accuracy and which competitors appear.
- Repeat monthly with the same prompts, noting that answers vary between runs.
- Track referral traffic from AI tools in analytics, and branded search volume in Search Console.
GEO and SEO compared
| Traditional SEO | GEO | |
|---|---|---|
| Goal | Rank pages and win clicks | Be used, cited and described accurately in AI answers |
| Main signals | Relevance, quality, links, technical health | The same, plus clarity, evidence and brand consistency across sources |
| Measurement | Rankings, clicks, conversions | Mentions, citations, accuracy, AI referrals, branded search |
| Content style | Comprehensive, well-structured pages | Also quotable, specific and well sourced |
| Off-site | Links | Links and unlinked mentions in trusted sources |
What GEO cannot do
- It cannot guarantee inclusion; AI systems change frequently and answers vary.
- It cannot replace a strong product, reputation and real expertise.
- It cannot rely on tricks; manipulative tactics are as likely to fail with AI systems as with search engines.
- It cannot always bring clicks; some answers satisfy the user without a visit, so brand awareness and conversion-focused pages matter.
Common GEO mistakes
- Chasing special files or markup that Google says it does not need, while basic SEO issues remain.
- Vague content without numbers, sources or specific answers.
- Inconsistent facts about the business across the site and the web.
- Ignoring off-site mentions and reviews.
- Not testing how AI tools describe the brand.
- Keyword stuffing, which the research found ineffective.
A 90-day GEO plan
| Days | Focus |
|---|---|
| 1 to 30 | Baseline AI visibility test, technical SEO check, fix inconsistent business facts, identify key pages |
| 30 to 60 | Rewrite key pages with direct answers, statistics, citations and clear structure; publish one original data piece |
| 60 to 90 | Digital PR and listings for brand mentions, review programme, repeat visibility test and compare |
Need help putting this into practice? See our generative engine optimization services and AI SEO agency work.
Sources
- Aggarwal et al., GEO: Generative Engine Optimization (arXiv, KDD 2024). arxiv.org
- Google Search Central: AI features and your website. developers.google.com
- Google Search Central: Creating helpful, reliable, people-first content. developers.google.com
- Google Search Central: SEO starter guide. developers.google.com