SEO vs AEO vs GEO: What's the Difference, and Which Should a Hong Kong Clinic Choose?
A decade ago, “getting found by patients” meant ranking high on Google. Today patients also ask ChatGPT, read the AI summary atop Google, and research on Perplexity. To appear across these old and new channels, clinics need to understand three terms: SEO, AEO, and GEO.
SEO: rank higher on Google
SEO (Search Engine Optimization) is the most established layer. Its goal is to rank your site high in Google's organic results and win the click.
It covers keyword strategy, content, technical work, and local search. For clinics, symptom-led and local keywords are the main entry points.
AEO: get referenced by AI search
AEO (Answer Engine Optimization) leans on machine-readable answer formats: explicit questions, concise answers, extractable passages, and FAQPage schema.
The aim is to make it easier for ChatGPT, Google AI Overviews, and Perplexity to reference your content as an answer source.
GEO: make generative AI trust you
GEO (Generative Engine Optimization) goes further, focusing on E-E-A-T authority and entity consistency — physician bylines, professional review, credentials, and consistent organisation data across platforms.
Generative AI tends to cite trusted, authoritative sources; GEO makes your clinic that trusted source. Medical content especially rewards this.
How should a clinic combine them?
These aren't either-or — they're one system: SEO builds baseline traffic, AEO makes content easy for AI to extract, GEO builds the authority AI trusts. They share the same content and technical base, not three separate budgets.
One honest note: neither AEO nor GEO can guarantee an AI citation; what we do is optimise structure and authority to improve the chance of being referenced.