The difference between SEO and GEO
SEO helps you rank in a list of links. GEO helps AI systems understand and reference your business. Here is how they differ, and why you need both.
For two decades, being found online meant one thing. Ranking in Google's list of blue links. Search Engine Optimization is the discipline of earning those rankings. It still matters enormously. But it is no longer the whole story.
A growing share of people now get answers, not links. They ask ChatGPT, Perplexity, or Google's AI Overviews a question and receive a written response that references a handful of businesses or sources. Generative Engine Optimization is the practice of making sure your business is well represented in those answers.
SEO. Ranking in a list of links
SEO optimizes for a search engine results page. The goal is to appear as high as possible for the terms your customers search, through a mix of technical health, relevant content, and credible links.
GEO. Being understood and referenced by AI
GEO optimizes for how AI systems describe your business inside an answer. Instead of competing for a position in a list, you are working to be the trustworthy, well understood option an AI is comfortable referencing. That depends on signals like:
- Clear, structured information about who you are and what you do
- Consistent business details across the sources these systems read
- Content that directly answers the questions customers ask
- Credible mentions that corroborate your expertise
Where the two actually differ
Most of GEO is SEO done properly, and Google says as much. Where it differs is specific, and it is the part most agencies skip.
- Each AI tool reads the web through its own index. ChatGPT searches Bing and its own index, Claude uses Brave, Perplexity built its own. A site that ranks in Google but is absent from Bing does not exist for ChatGPT.
- Mentions beat links. Across 75,000 brands, how often a brand is mentioned on other websites predicts its AI visibility about three times better than how many links it has.
- Answers change every time. Ask the same question ten times and the list of names shifts, so visibility is a share of answers over many runs, never a position.
- Most of what an AI reads is not your website. When we asked about marketing agencies in Santa Barbara, the answers were built from Clutch, Reddit, Semrush, Expertise.com and Yelp, not from the agencies' own sites.
Why you need both
SEO and GEO are not rivals. They draw on many of the same foundations. A technically sound site, genuine authority, and content that answers real questions help you in Google's links and in AI answers alike. The businesses that win are the ones building both at once.
A note on expectations. No one can guarantee you will appear in a specific AI tool. What good work does is improve the signals that make your business easier for these systems to understand, trust, and reference.