Three disciplines. Three different goals. Three different success metrics. Here is exactly what separates them — and which one your brand actually needs right now.
SEO (Search Engine Optimization) optimises websites to rank in traditional Google search result lists. AEO (Answer Engine Optimization) optimises content to be cited as a direct answer by AI systems including ChatGPT, Google AI Overviews, Claude, Gemini and Perplexity. GEO (Generative Engine Optimization) optimises content to be cited as trusted reference material by large language models in their generated outputs. The three disciplines are complementary. SEO optimises for ranking. AEO optimises for answers. GEO optimises for AI-generated citations. Nearly 40% of Google AI Overviews cite pages from top-10 organic search results — SEO and AEO overlap here. A brand can rank well in traditional search and be completely absent from AI-generated answers, and vice versa.
Rank pages in Google's search result list so users click through to your website.
Be cited as the direct answer by AI systems — ChatGPT, Google AI Overviews, Claude, Gemini, Perplexity — often without the user visiting your site.
Be the trusted reference material large language models cite when generating answers — through original research, data, and authoritative content.
SEO optimises for ranking. AEO optimises for answers. GEO optimises for AI-generated citations. All three are compatible — and distinct enough to require separate attention.
| Dimension | SEO | AEO | GEO |
|---|---|---|---|
| Primary goal | Rank pages for keywords in Google | Be cited as the direct answer in AI responses | Be the trusted source LLMs reference in generated content |
| Target system | Google's ranking algorithm | AI answer engines — ChatGPT, Gemini, Claude, Perplexity | Large language models — same systems, optimised at a different layer |
| Success metric | Keyword rankings, organic traffic, click-through rate | Citation frequency, AI mention rate, visibility score | LLM recommendation rate, brand mention in AI-generated content |
| Content format | Long-form articles, keyword-optimised pages, pillar content | Direct answers, FAQPage schema, entity definitions, structured data | Original research, proprietary data, comparison content, authoritative guides |
| Technical setup | Google Search Console, sitemap, Core Web Vitals, backlinks | FAQPage schema, entity schema, Bing Webmaster Tools, OAI-SearchBot allowed | Indexed on trusted third-party publications, consistent entity descriptions across sources |
| Link value | High — backlinks drive rankings directly | Medium — third-party citations matter more than raw backlinks | Medium — being cited by trusted sources AI models reference matters most |
| Click-through | Essential — the goal is website traffic | Optional — value is in being the cited answer | Optional — value is in being the source LLMs trust |
| Speed of results | Months to years | Weeks to months | Weeks to months (training data and retrieval cycles) |
| Brand size bias | High — established authority sites dominate | Lower — content quality competes regardless of domain age | Lower — original data and entity clarity matter more than domain authority |
| Overlaps with | AEO (40% of AI Overviews come from top-10 organic) | SEO (ranking helps) and GEO (same AI systems, different layer) | AEO significantly — both target AI citation |
AEO and GEO are frequently used interchangeably. They are not the same thing, but they overlap significantly and the distinction is one of emphasis rather than opposition.
AEO focuses on how content is structured — direct answers first, FAQPage schema, clear entity definitions, machine-readable formatting that allows AI systems to extract and cite content cleanly. The question AEO asks is: can AI pull a clean answer from this page?
GEO focuses on what content exists — original research, proprietary data, authoritative comparison guides, and content that gives AI systems something genuinely worth citing. The question GEO asks is: is there something on this page that AI would want to reference?
The most effective AI search strategy combines both: content worth citing (GEO) structured so AI can extract it cleanly (AEO), built on a technical foundation that makes it eligible for AI retrieval at all — Bing indexing for ChatGPT Search, Google indexing for AI Overviews and Gemini.
Most brands need all three at different priority levels. SEO first if you have no organic traffic. AEO next if AI systems don't mention you. GEO when you're ready to invest in being the authoritative source.
Check what ChatGPT, Claude and Gemini currently say about your brand. Scores from 0–100 per model. No account required. The fastest way to know whether you have an AEO or GEO problem — or both.
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