Generative Engine Optimisation (GEO) is the practice of making content authoritative enough to be cited in AI-generated responses by tools like ChatGPT, Perplexity and Claude. Key techniques: cite primary sources, use specific statistics, name the author with credentials, write in conversational query language, and maintain content freshness.
GEO extends AEO beyond Google. The same principles that make content extractable for featured snippets also make it citable by AI tools, with some important additions that matter specifically for large language models.
What GEO Means
Generative Engine Optimisation is the practice of making your content authoritative, structured, and trustworthy enough to be cited in AI-generated responses across platforms that do not use traditional search ranking. The targets are ChatGPT, Perplexity, Claude, Gemini, and future AI-powered tools.
GEO Signals That Differ from SEO
Verifiable statistics with sources: LLMs extract specific numbers far more reliably than vague claims. A sentence like “According to Ahrefs data, AI Overviews have reduced click-through rates for top-ranking content by 58%” is both specific and attributed, making it a strong GEO signal.
Named author with credentials: AI attribution systems prefer content with clear human authorship. A byline with name, title, and brief credentials outperforms anonymous or generic author fields.
Cited primary sources: linking to original studies, official data, and authoritative sources signals trustworthiness to both AI tools and search engines. This is the single most underused GEO technique.
Regular content updates: AI systems deprioritise stale content. A “last reviewed” date is a lightweight signal. Updating key statistics annually keeps the content competitive for GEO citation.
Measuring GEO Performance
Direct measurement of AI citation is difficult because AI tools often do not pass referral data. Proxy metrics include: branded search volume growth (people searching for your brand after seeing it in an AI response), direct traffic increases following content updates, and manual testing by querying AI tools with your target questions and checking whether your content is cited.
DotTheta’s Prism SEO tool scores GEO readiness across E-E-A-T indicators, author attribution, primary source citations, entity density, and content freshness in a free URL audit.
- ChatGPT processes 2.5 billion prompts daily
- LLM citation ranking factors differ significantly from Google ranking factors (University of Toronto research)
- Content citing primary sources is cited more reliably by AI systems
- Specific numerical claims are extracted more reliably than qualitative statements
