Short answer. SEO, GEO and AEO are overlapping disciplines with different primary outputs. SEO improves visibility in conventional search results. GEO improves brand/source visibility in generative AI answers and recommendations. AEO focuses on making information easy to extract and present as a direct answer. In practice, a strong modern search program uses all three: SEO for crawlability, authority and search demand; AEO for answer-ready structure; and GEO for prompt-level visibility, citations, brand mentions and third-party authority across AI interfaces.
- Core metrics
- SEO
- Rank in search results
- Organic listings
- Rankings, impressions, clicks, conversions
- AEO
- Become the direct answer
- Featured/direct answers and answer-engine extraction
- Answer presence, snippet/AI-answer inclusion
- GEO
- Be mentioned/cited/recommended in generative answers
- Brand mentions, citations and recommendation sets
- Mention rate, citation rate, share of voice, accuracy
What is SEO?
Search Engine Optimization improves how a website is crawled, indexed, understood and ranked in traditional search. Technical SEO, content quality, internal linking, authority and user relevance remain foundational to AI search because many generative experiences retrieve information from the public web.
What is AEO?
Answer Engine Optimization is the practice of structuring information so that an answer-oriented system can retrieve and present a concise response. It emphasizes clear questions, direct answers, entity clarity and structured information.
AEO existed before modern LLM search through featured snippets, voice assistants and knowledge panels. Its modern meaning has expanded because ChatGPT, Gemini and Perplexity are also answer engines in a broader sense.
What is GEO?
Generative Engine Optimization focuses on visibility inside generated answers. That can mean being cited as a source, mentioned as a brand, included in a recommendation set or described accurately during product/service research.
GEO adds a measurement problem that SEO does not have: there is no stable 'position 3' across every run. Teams therefore track prompt sets, repeated outputs, citation patterns and competitor share of voice.
Where do the disciplines overlap?
| Capability | SEO |
|---|---|
| AEO | GEO |
| Technical crawlability | Core |
| Important | Core foundation |
| High-quality content | Core |
| Core | Core |
| Question-based structure | Useful |
| Core | Useful |
| Structured data | Useful |
| Useful | Clarifies entities; not a guarantee |
| Backlinks/authority | Core |
| Useful | Important |
| Third-party brand mentions | Indirect |
| Useful | Especially important |
| Prompt tracking | Not typical |
| Sometimes | Core measurement |
| Citation/mention tracking | Not typical |
| Important | Core |
| Traditional rank tracking | Core |
| Useful | Supporting signal |
How do Google AI Overviews fit?
Google's AI Overviews and AI Mode blur the boundaries. They are generative answer experiences built on Google Search, so the ordinary SEO foundation remains highly relevant. Google explicitly says there are no special additional requirements to appear in these AI features.
Google's official AI-features guidance
How do ChatGPT and other assistants fit?
ChatGPT search can surface and cite public web content. OpenAI recommends allowing OAI-SearchBot for sites that want their content to be discoverable and cited. That is a technical access issue that resembles SEO, while the answer/recommendation layer is closer to GEO/AEO.
OpenAI publisher guidance
Which discipline should a business prioritize?
| Situation | Priority |
|---|---|
| Website is poorly indexed/ranking | SEO first |
| Pages rank but do not answer user questions clearly | AEO/content restructuring |
| Brand rarely appears in AI recommendation prompts | GEO + authority + measurement |
| Brand appears but is described inaccurately | Entity clarity + third-party evidence |
| AI citations exist but traffic/conversions are weak | Broader content/offer/CRO strategy |
| Enterprise program | Integrated SEO + AEO + GEO |
What does an integrated workflow look like?
Use SEO research to understand demand and indexable opportunities.
Structure priority pages with AEO-style direct answers and useful subquestions.
Build GEO measurement around buyer-aligned prompts.
Identify which sources and competitors appear in AI answers.
Improve owned content and off-site authority.
Track rankings, AI mentions, citations and business outcomes together.
Key takeaways
- Discipline
- Primary goal
- Typical output
Sources and further reading
- Google Search Central - AI features and your website.
- Google Search Help - How AI Mode works.
- OpenAI - Publishers and Developers FAQ.
- Princeton / KDD - GEO: Generative Engine Optimization.
- Graphite - AEO vs GEO vs AI SEO.
- Siege Media - GEO Guide.
- Directive - GEO Guide.
- Omnius - What is GEO?.