SEO vs GEO vs AEO: What Each One Means

Three acronyms now get thrown around whenever anyone talks about being found online. Agencies sell them as separate services, which makes it sound like you need three budgets.

You don't. They describe three overlapping ways people discover a business, and one well-built page can serve all of them. It still helps to know what each one asks of your website, and where the overlap ends.

What do SEO, GEO and AEO stand for?

GEO and AEO are industry terms, not standards. People use them loosely, and no search engine or AI company publishes a GEO rulebook. What the platforms do publish is how they find and choose pages, and that's where the practical advice comes from.

What is SEO?

SEO is about being ranked. It's the oldest of the three and still the foundation.

A search engine crawls your site, decides what each page is about and how trustworthy it is, and ranks it against every other page competing for the same search. The fundamentals haven't changed much: pages that genuinely answer what people search for, a site that's fast and easy to crawl, clear structure, and signals from elsewhere on the web that real people vouch for you.

Google's own guidance on helpful content asks whether a page offers original information or analysis and substantial value compared with other results. That question sits under everything else in this guide. How long it takes to pay off is covered in how long SEO takes.

What is GEO?

GEO is about being used by AI. More people now ask an AI assistant instead of scrolling through results. The assistant reads sources, writes an answer and often cites a few of them.

GEO is the work of making your pages the ones it reads, trusts and cites. The mechanics differ by tool, but the pattern is consistent: most assistants search the web first, then write.

ChatGPT search

Searches the web and shows inline citations. OpenAI says queries may go to third-party search providers, including Bing.

OpenAI's crawlers

OAI-SearchBot decides whether you can appear in ChatGPT search answers. GPTBot is for model training, and blocking it doesn't affect search visibility.

Perplexity

Searches the web in real time and adds numbered citations linking to sources.

Google AI Overviews

Draw on pages that are indexed and eligible for a snippet in regular Search. Google says no special optimization is required.

Because assistants lean on search indexes, strong SEO feeds directly into GEO. The tool-by-tool detail is in how to get cited by ChatGPT, how Perplexity picks sources and how to show up in Google AI Overviews.

What is AEO?

AEO is about being the answer. It's the narrowest of the three.

AEO is about the exact moment someone asks a specific question and gets one answer back. To be that answer, a page needs to state it clearly and early, ideally in the first couple of sentences under a heading that matches the question, then back it up in more depth below.

That's why every guide on this site opens with a short answer box. It's AEO in practice. You can see how it's working for us on the public scoreboard.

Where do SEO, GEO and AEO overlap?

The overlap is bigger than the differences. All three reward the same core qualities.

Two of the shared qualities deserve their own guides. Structured data tells machines exactly what your business is, as long as it matches what's visible on the page. Topical authority explains why a site that covers one subject thoroughly beats one that covers many thinly.

Where do most sites go wrong?

Most sites chase one of these and accidentally undercut another. A page rewritten to sound more persuasive loses the direct answer that made it useful to an AI. A page stuffed with keywords for SEO reads like noise to a person.

Others chase shortcuts. Google says you don't need new machine-readable files or special markup for its AI features, which is why we treat llms.txt as optional. Time spent on gimmicks is time not spent on pages that answer questions well.

Getting all three right at once is less about tricks and more about keeping the whole site aligned to a plan, page by page, every time something changes. We explain why that's hard with AI tools in why most AI-built websites don't rank.

How do you measure each one?

Each is tracked in a different place, and none of the tools gives the whole picture.

• SEO: impressions, clicks and positions in Google Search Console and Bing Webmaster Tools
• AEO: whether your page supplies the snippet or short answer for its target question
• GEO: whether ChatGPT, Perplexity, Gemini and AI Overviews cite you for a fixed list of prompts
• All three: inquiries that name a search engine or AI tool as how they found you

Google and Bing now report AI impressions and citations, but ChatGPT and Perplexity don't, so the reliable method is still a repeatable manual check. We describe it in how to check if AI mentions your business.

Do small businesses need GEO and AEO?

Yes, but not as separate projects or separate budgets. For a local or lead-buying business, GEO and AEO are mostly a short list of habits added to SEO you should be doing anyway. Anyone selling them as a standalone retainer is selling the label.

The reason is simple. Your customers ask the same questions whether they type them into Google or ask ChatGPT, and the assistants find answers through search indexes. A page that ranks and answers plainly is already most of the way there.

What a small business actually needs to do, in order of payoff:

1. Get indexed in Google and Bing. Verify the site in Search Console and Bing Webmaster Tools. ChatGPT search can draw on Bing, so a site Bing hasn't indexed is hard for it to find.
2. Let the search crawlers in. Allow OAI-SearchBot, PerplexityBot and Googlebot in robots.txt and at your host or CDN. This is the single cheapest GEO fix.
3. Answer one buyer question per page, answer first. "How much does a roof replacement cost in Columbus" or "can I get a HELOC with a 640 score" gets its own page, with the answer in the first two sentences. That is the whole of AEO for most businesses.
4. Keep your business details identical everywhere. Name, address, phone, services and service area should match on your site, your Google Business Profile, Bing Places and the directories in your trade.
5. Add one thing only you know to each page. Your prices, your approval experience, your local job photos. This is what makes an assistant pick you over an aggregator.
6. Check monthly. Ask ChatGPT, Perplexity and Google your top ten buyer questions and note who gets named.

For the local angle in detail, including Bing Places and review sites, see the local section of how to get a local business recommended by ChatGPT.

Where should you start?

Start with SEO fundamentals, because the other two depend on them: crawlable pages, one clear question per page, and honest structured data. Then write each page answer-first for AEO. Then open your site to the AI crawlers and check monthly whether you're cited.

If you're still deciding whether this is worth the effort compared with buying leads, read alternatives to buying leads.

Common questions