Your customers are looking for you in two places: Google and AI assistants. Each requires a different strategy. Here's how they compare.
| Dimension | GEO | SEO |
|---|---|---|
| Full name | Generative Engine Optimization | Search Engine Optimization |
| Target engines | ChatGPT, Google Gemini, Perplexity, AI Overviews | Google, Bing, DuckDuckGo |
| Output format | Generated text answer — brand mentioned or not | Ranked list of links on a results page |
| User action | Reads the answer; brand gets cited or missed | Clicks a link to visit your page |
| Primary metric | Mention rate, citation rate, GEO Score (0–100) | SERP rank, organic traffic, impressions |
| Key signals | External citations, structured data, factual clarity, entity recognition | Backlinks, E-E-A-T, page speed, keyword relevance |
| Content format wins | FAQ schema, comparison pages, factual definitions, cited sources | Long-form posts, pillar pages, internal linking |
| Update speed | AI models update on their own schedules — weeks to months | Google crawls and re-ranks continuously |
| Measurement tool | Vizil GEO Score, manual probe testing | Ahrefs, Semrush, Google Search Console |
| Maturity | Emerging discipline (2023–present) | Mature discipline (1990s–present) |
The good news: a strong SEO foundation helps GEO. Both disciplines benefit from clear, factual content that external sources cite. Both reward structured data markup. Both benefit from a strong external link profile.
Building comparison pages, publishing FAQ content with schema, and earning industry mentions — these improve both your Google rankings and your AI visibility.
The critical difference: SEO is about click-through. GEO is about being cited. A page optimized for long-tail keywords with lots of internal links may rank well in Google without ever being cited by an AI model.
AI models care about factual credibility and external citation more than on-page keyword density. Your About page saying "We are the best X" won't get cited. Your feature page with a clear factual definition and external links pointing to it will.
Vizil measures both. Your GEO Score tracks AI visibility across ChatGPT and Gemini. Your SEO Audit tracks technical and keyword performance in traditional search. Both run from the same URL, share the same brand memory, and feed into the same CMO strategy.
GEO Score + SEO Audit — both free, both in one session.
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