Reference
The GEO Glossary.
Every term in generative search, defined in plain English, and marked up so the engines can lift the definitions cleanly.
Generative Engine Optimization (GEO)
- The practice of structuring content and technical infrastructure so AI engines cite and recommend your brand in their generated answers.
Answer Engine Optimization (AEO)
- The trust layer of GEO: making a page eligible to be used as an answer through clarity, structure, and credibility signals.
Answer capsule
- A 40–60 word, self-contained answer placed immediately under a heading. Most AI-cited blog posts open with a concise answer capsule like this.
Share of voice (AI)
- The share of relevant AI answers that cite you versus competitors, for a defined set of buyer prompts.
Citation
- An explicit reference to your brand or page inside a generated answer, the core unit of GEO success.
Entity
- A distinct, machine-resolvable concept (a company, product, person). Entity clarity helps engines know who you are and trust you.
llms.txt
- A proposed plaintext file that gives AI systems a concise, curated map of your site's most important content.
Fact density
- How many verifiable, sourced facts a page contains. A statistic every ~150–200 words materially increases citation odds.
Perplexity (of text)
- A measure of how predictable text is. Clear, declarative writing lowers perplexity and is more likely to be quoted by models.