SEO vs AEO vs GEO: what's the difference and which do you need?
By Christopher Robinson · Updated · 7 min read
Short answer
SEO gets your page ranked. AEO gets a direct answer lifted from it. GEO gets your business named by AI assistants like ChatGPT and Perplexity. You need all three, in that order.
What is SEO?
SEO (search engine optimization) is the work that gets a web page crawled, indexed and ranked in Google and Bing for the searches your buyers type. It covers technical health, page relevance and authority from links and mentions. SEO is the base layer: if a page isn't indexed, no answer engine or AI can use it.
- Pages can be crawled and indexed
- Titles and headings match the search
- The site is fast and works on mobile
- Other trusted sites link to or mention you
What is AEO (answer engine optimization)?
AEO is formatting content so answer engines — Google's AI Overviews and featured snippets, voice assistants and AI chat tools — can extract a clean, self-contained answer. In practice it means question-shaped headings, a 40–60 word direct answer under each, lists and tables for comparisons, and visible FAQs that match real questions.
AI systems don't read a page top to bottom like a person. They split it into chunks and score each chunk against the question. A section that only makes sense after reading the three before it scores badly. A section that answers its own heading in the first two sentences scores well.
- Question-led H2s (“How much does X cost?”)
- A direct answer in the first 40–60 words of each section
- Tables for comparisons, numbered steps for processes
- Visible FAQ blocks with FAQPage schema
What is GEO (generative engine optimization)?
GEO is earning enough trust and clarity that generative AI tools — ChatGPT, Perplexity, Gemini, Copilot, Claude — are willing to recommend or cite you. It depends on AI crawlers being able to fetch your pages, consistent business facts across the web, original data and expertise, and third-party mentions that confirm what you say about yourself.
- Server-rendered HTML that crawlers without JavaScript can read
- Robots.txt that allows AI search crawlers such as OAI-SearchBot, PerplexityBot and Claude-SearchBot
- The same name, address, phone and profiles everywhere
- Original numbers only you have — your prices, results, case studies
- Named authors with real experience
SEO vs AEO vs GEO at a glance
SEO decides whether you're found, AEO decides whether your words are used in the answer, and GEO decides whether an AI trusts you enough to name you. They build on each other: an unindexed page can't be quoted, and an untrustworthy source won't be recommended.
| SEO | AEO | GEO | |
|---|---|---|---|
| Goal | Rank in results | Be the extracted answer | Be recommended or cited by AI |
| Where it shows | Google & Bing results, map pack | AI Overviews, snippets, voice | ChatGPT, Perplexity, Gemini, Copilot |
| Main levers | Indexing, relevance, links | Structure, direct answers, FAQs | Crawl access, consistency, original data, mentions |
| Measured in | Search Console clicks & position | Snippet and AI Overview appearances | AI referrals and manual prompt checks |
Which one should you start with?
Start with technical SEO, because nothing else works on pages that can't be crawled. Then restructure your money pages for AEO with direct answers and FAQs. GEO comes last and never really ends — it's the ongoing work of publishing original information and keeping your business facts consistent across the web.
A common mistake is chasing AI visibility on a site that is still a client-side JavaScript app. Many AI crawlers fetch the raw HTML and never run your scripts, so they see an empty page. Pre-rendering every route is often the single biggest GEO fix available.
How do you measure AI search visibility?
Track referral traffic from chatgpt.com, perplexity.ai and similar domains in your analytics, watch Search Console for impressions on longer question-style queries, and run a fixed set of prompts in each assistant every month to see whether your business is named. Treat it as a trend, not a daily number.