GEO vs SEO, settled.

Short answer

SEO optimises for placement in a list of ten ranked links read by a human. GEO (Generative Engine Optimisation) optimises for inclusion inside a single synthesised answer written by ChatGPT, Gemini, Perplexity or Claude. They share some signals (authority, schema, content quality) but the decision-maker, the ranking factors and the measurement are different.

Where SEO and GEO diverge

• Decision-maker: SEO targets a search algorithm + human reader. GEO targets a language model that selects a small named set.
• Output: SEO produces a list of links. GEO produces one paragraph with one or more named brands.
• Top signals: SEO weights backlinks, on-page relevance and CTR. GEO weights entity legibility, cross-platform coherence, and corroborated third-party authority.
• Measurement: SEO measures rank, traffic, conversions. GEO measures inclusion probability across a fixed buyer-shaped query set on each engine.

Where they overlap

Schema, entity definition, content quality and high-authority backlinks help both. A site that is well-structured for SEO is rarely punished by AI engines. The work compounds - but only if the GEO-specific levers (interpretability, coherence, intent alignment) are explicitly engineered.

Which one your business needs

If your buyers research with AI before contact, you need GEO now. If your buyers still discover you primarily through Google, you need SEO sustained. Most B2B and high-consideration consumer brands need both, sequenced - GEO first because the window to claim category presence in AI answers is closing fastest.