DefinedTerm · Glossary
What is AEO (Answer Engine Optimisation)
Answer Engine Optimisation (AEO) is the discipline of structuring and formatting content so that AI tools such as ChatGPT, Perplexity, and Google AI Overviews select and cite it as a direct answer to a user query — without requiring any click on a search result. AEO complements classical SEO and prioritises authority, semantic structure, and citability over click-through ranking.
Full definition
Answer Engine Optimisation (AEO) is the set of editorial, technical, and structural techniques designed to make an AI-powered answer engine select a piece of content as the cited source when generating a direct response to a user's question.
Where conventional SEO optimises for a URL to appear at the top of a list of search results, AEO optimises for a fragment of that content to be quoted verbatim or paraphrased inside a generated answer. The destinations where this occurs include Google AI Overviews, Google AI Mode, Perplexity, ChatGPT Search, and AI-powered voice assistants.
The core technical levers of AEO are: semantic structuring with schema.org vocabularies (FAQPage, HowTo, Article), direct-answer headings that mirror the user's question, citable definition blocks of 40 to 80 words, and explicit citation of external sources that reinforce the document's authority signal.
Why it matters in 2026
Data from SE Ranking (May 2025) shows that Google AI Overviews appear in approximately 30% of tracked queries in the United States. According to Optimizely, the share of zero-click searches on Google rose from 56% in 2024 to 69% in 2025. In that environment, being cited inside a generated answer carries more brand value than occupying the first organic position without being referenced.
The same source indicates that traffic originating from AI-generated answers converts at a rate 4.4 times higher than traditional organic traffic, suggesting that users who arrive after an AI answer carry a stronger declared intent and lower decision friction. For trades and home-improvement businesses whose buyers make high-consideration purchases, this quality differential is commercially significant.
How it works
- Identify real user questions with direct-answer intent (who, what, how, why).
- Write a direct definition paragraph of 40 to 80 words at the opening of each relevant section.
- Implement schema.org FAQPage markup for blocks of frequently asked questions.
- Cite verifiable external sources within the body text, with inline hyperlinks.
- Use H2 and H3 headings that replicate the user's question literally.
- Structure numbered lists for procedural answers.
- Measure visibility in answer engines using specialist AI Overviews tracking tools.
Difference from SEO and GEO
| Dimension | SEO | AEO | GEO |
|---|---|---|---|
| Primary objective | Organic SERP position | Citation in a direct AI answer | Visibility in generative engine responses |
| Key metric | Ranking + click-through rate | Answer share / citation count | Frequency of mention in generated responses |
| Main lever | Backlinks, domain authority | Semantic structure, citable block | Statistics, external citations, authoritative voice |
| Time horizon | Medium to long term | Near-immediate once the model updates its RAG index | Depends on the engine's indexing cycle |
Related terms
Generative Engine Optimisation (GEO), Google AI Overviews, Google AI Mode.
Fuentes
Términos relacionados
- geo-generative-engine-optimization
- ai-overview
- ai-mode-google