GEO vs SEO: what changes when the search box is a chatbot

1. The difference in one line

SEO gets you ranked on a page of links. GEO gets you quoted inside the answer. That’s the whole distinction in a sentence, and everything below follows from it.

With SEO the prize is a high spot in the list of ten blue links, and the click that comes with it. With GEO the prize is being the source an AI names when it writes a single answer back, often with no list and no click at all. Same web, same foundations, different finish line. If you’d rather watch the distinction explained, WebFX’s GEO vs AEO vs SEO breakdown runs through it in under four minutes. It also previews AEO, which we clear up further down.

2. What SEO actually does

SEO is the work of getting one of your web pages to rank near the top of a normal search results page. You shape the content, the keywords, the links pointing in and the technical health of the site so that Google shows your page high in its list, and someone clicks through to you. The currency is the click.

It’s a mature craft, decades deep, and it still works. A page that ranks first for a term people search gets a steady stream of visitors who chose to come to you. None of that goes away. It’s the floor everything else is built on.

3. What GEO actually does

GEO, generative engine optimisation, is the work of getting your business named and cited inside the answer an AI writes back. When someone asks ChatGPT, Perplexity, Gemini or Google’s AI Overviews a question, the engine doesn’t hand back ten links. It writes one synthesised answer and names a few sources it leaned on. GEO is being one of those sources.

The currency here is the mention, not the click. You’re not trying to be link number three on a page someone scrolls. You’re trying to be the business the AI brings up when it answers the question your customer actually asked. It goes by other names too, answer engine optimisation and LLM SEO among them, and we’ll untangle those in step 8.

4. The real change: how a generative engine reads the web differently

This is the part the comparison tables skip, and it’s the whole reason GEO is a separate idea at all. A normal search engine matches your page to a query and ranks it in a list. A generative engine does something different: it breaks the question into several smaller ones, searches each, pulls passages from across many sources, and writes one answer that stitches the best bits together, citing a handful of them.

Your customer asks a question, in plain English

The engine splits it up into several sub-questions

It pulls passages from many sources

It writes one answer the best bits, stitched together

The prize It cites a handful be one of them

Three things follow from that, and they’re why the writing rules shift.

First, it reads in chunks. It lifts a passage, not a whole page, so each passage has to make sense pulled out on its own. Second, it fans out. It covers a topic by asking several sub-questions, so genuinely covering a subject beats ranking for one phrase. Third, it favours agreement. It leans toward sources that are recent, that other sources back up, and that already carry some authority.

Where the engine looks matters too. ChatGPT’s search leans heavily on Bing’s index, with one study finding about 87% of its citations matched Bing’s top results, Perplexity crawls the live web, and Google’s AI Overviews use Google’s own index. You might hear this whole looking-things-up step called “RAG”, retrieval-augmented generation. Ignore the name. It just means the AI looks things up before it answers instead of relying on memory.

5. What stays the same: the shared foundation

Here’s the reassuring part. Most of GEO is good SEO. The AI reads the same web your SEO already works on, so the foundations carry straight over.

A site a crawler can actually read. Fast, clean pages. Content that answers real questions in plain language. Real authority, built by being linked to and talked about on other trusted sites. Every one of those matters as much to the machine as it does to Google. Strip them out and you’re invisible to both. So if your SEO is in decent shape, you’re already most of the way into GEO, and the gap between the two is smaller than the acronyms make it sound.

6. What changes in how you write

A few things shift from “rank a page” to “be quotable”, and they’re small changes with outsized effect.

Answer the question in the first line, of the page and of every section, because the engine lifts standalone passages and a sentence that only makes sense after three paragraphs above it will never get quoted. Be specific: real numbers, named tools, dated facts. The one solid academic study on this, Princeton’s GEO research, found that adding citations to a page lifted its visibility in AI answers by about 40%, adding statistics by 37%, and adding direct quotations by 22%. Vague content loses on every axis. Use the real question as your heading, in the words people actually type. And get talked about off your own site, because the engine trusts a claim more when several independent sources agree on it.

None of that fights good SEO. It is good SEO, written for a reader that quotes instead of links.

7. Does GEO replace SEO? The honest answer

No. GEO extends SEO, it doesn’t replace it, and anyone telling you SEO is dead is selling you something. But the economics underneath are shifting, and that’s the real reason to pay attention.

When an AI answers in the box, fewer people click. Pew Research tracked the browsing of 900 US adults in March 2025 and found they clicked a search result 8% of the time when an AI summary appeared, against 15% when it didn’t, roughly half. Only 1% clicked a link inside the summary itself. Over the same kind of period, Similarweb put zero-click searches up from 56% to 69% in a year, and Google’s AI Overviews now reach about 2 billion people a month. So a page-one ranking still matters, it just earns fewer clicks than it used to, and being named inside the answer is becoming the visibility that counts. You’re not swapping one for the other. You’re keeping the foundation and adding a second finish line.

No AI summary 15%

AI summary shown 8%

8. The jargon: AEO, LLM SEO, AI Overviews, AI search

You’ll run into four or five names for roughly the same shift, and the acronym soup is mostly noise. Don’t let it slow you down.

AEO, answer engine optimisation, is the same idea framed as getting picked as the direct answer. LLM SEO and “AI search optimisation” are the same thing again under different labels. AI Overviews are Google’s version of the AI answer that sits above the normal results, AI Mode is the fuller chatbot version of Google search, and a “generative engine” just means any AI that writes an answer instead of listing links. They overlap so heavily that splitting hairs between them is a waste of your time. Optimise to be the clear, well-evidenced, widely-trusted answer to your customers’ questions, and you’re doing all of them at once.

9. What to actually do about it

Start by doing nothing new and everything well: get the SEO foundations right, because they’re roughly 80% of GEO and the AI reads that same web. Then add three things you can do yourself without hiring anyone.

Check your own visibility. Open ChatGPT, Perplexity, Gemini and Google’s AI Mode, type the questions a customer would genuinely ask in your category, and note whether you get named and who does instead. Do it every few weeks. It’s free and it tells you exactly where you stand. Make your key pages answer-first and specific, so they’re easy to quote. And get mentioned where your customers already trust other voices, because off-site agreement is what tips the engine toward naming you.

If you want the full step-by-step on how AI search picks its sources and how to become one it cites, our GEO playbook covers it in depth. Where does paying for help make sense? When you want automated tracking, since entry-level tools like Otterly start around $29 a month and run the prompts for you, or when the work outgrows the time you’ve got. But be wary of anyone selling a secret GEO trick or a guaranteed AI ranking. There’s no ranking to guarantee and no trick to buy. You become the obvious answer the same way you always earned the top of the page: by being the clearest, most trusted, most talked-about source in your corner of the web.