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SEO (search engine optimization) gets your pages ranked in search results so people click through to your site. AEO (answer engine optimization) aims to get your content used or cited inside AI-written answers, such as Google's AI Overviews, ChatGPT search and Perplexity. On Google, the two are the same work: Google says there are no additional requirements to appear in AI Overviews or AI Mode, and calls optimizing for its generative AI search "still SEO." What changes is the result you measure, a citation instead of a click, and the AI engines outside Google, which set their own rules.
The AEO vs SEO question usually comes up when someone is selling you something new: an AEO audit, an AI visibility tool, an llms.txt file. The terms are real, but most of what separates them is packaging. A smaller part is a genuine change in how people search, and that part is worth acting on.
This guide compares the two side by side, shows what Google's own documentation says, then works through six real situations so you can see what to do in each. If you are starting from zero, our guide to SEO for small business covers the foundation everything here builds on.
AEO vs SEO at a Glance
| SEO | AEO | |
|---|---|---|
| Stands for | Search engine optimization | Answer engine optimization |
| The goal | Rank in the list of results and earn the click | Be used or cited inside an AI-written answer |
| Where it shows up | Google and Bing results pages | Google AI Overviews and AI Mode, ChatGPT search, Perplexity and other assistants |
| What a win looks like | A visit to your site | Your page cited as a source, or your business named in the answer |
| How you measure it | Clicks, impressions and position in Search Console | The Generative AI performance report in Search Console for Google; manual checks for other assistants |
| The work, on Google | Crawlable, indexed pages with useful, original content | The same. Google lists no additional requirements |
| Who sets the rules | Google and Bing | Google for its AI features; OpenAI, Perplexity and others for their own |
The rows that differ are the goal and the measurement. The row that matters most for a small business is the second to last: on Google, the work does not change.
What Google Says About AEO
Google's position is that AEO is SEO. Its guide to optimizing for generative AI features, last updated in July 2026, names both AEO and GEO and says that "optimizing for generative AI search is optimizing for the search experience, and thus still SEO." Its page on AI features and your website is just as direct: "There are no additional requirements to appear in AI Overviews or AI Mode, nor other special optimizations necessary."
The same guide goes through the tactics most often sold as AEO and says you do not need them for Google:
- llms.txt and AI files. "You don't need to create new machine readable files, AI text files, markup, or Markdown to appear in Google Search."
- Chunking pages into short pieces. "There's no requirement to break your content into tiny pieces for AI to better understand it."
- A special writing style. "You don't need to write in a specific way just for generative AI search."
- Special schema. Structured data is not required for generative AI search, and there is no special schema.org markup to add. Google still recommends structured data for ordinary rich results.
- Manufactured mentions. Seeking inauthentic mentions across the web "isn't as helpful as it might seem."
What Google does require is short. A page must be indexed and eligible to be shown in Google Search with a snippet. Google's robots controls that limit snippets or block indexing apply here too, so a page that uses them can limit or block its own appearance. Beyond that, the guide's main recommendation is content that people find unique, compelling and useful.
One limit to keep in mind: these documents describe Google's AI features only. They do not speak for ChatGPT, Perplexity or any other assistant.
What Is Actually Different
Two things genuinely change: how often a searcher clicks, and which companies decide what gets shown.
Fewer clicks when a summary appears. A Pew Research Center study of 68,879 Google searches by 900 US adults in March 2025 found that users who saw an AI summary clicked a traditional search result in 8% of visits, against 15% when there was no summary. They clicked a link inside the summary itself in 1% of visits. About 18% of the searches in the study produced an AI summary. So on searches where a summary appears, a good ranking earns fewer visits than it used to, and that is the honest case for thinking about AEO at all.
Other engines, other rules. ChatGPT, Perplexity and Claude are built by other companies, and each decides for itself which pages it reads and cites. OpenAI, for example, documents its crawlers: OAI-SearchBot is the one used for search, and "Sites that are opted out of OAI-SearchBot will not be shown in ChatGPT search answers." A separate crawler, GPTBot, collects content for training its models. If your robots.txt file blocks the search crawler, you are out of ChatGPT's search answers no matter how good the page is.
A different scoreboard. SEO counts visits. AEO counts appearances in answers, which may never produce a visit. For Google, the optimization guide points to the Generative AI performance report in Search Console, and Google's AI features page notes that traffic from AI features is included in your overall Search Console traffic. For other assistants, the simplest check is to ask them your customers' questions and see who they name.
AEO vs SEO vs GEO
GEO stands for generative engine optimization. It describes the same goal as AEO: getting your content used in AI-generated answers. You will also see LLMO (large language model optimization) and "AI SEO." Google's optimization guide names AEO and GEO together and treats both as part of SEO.
The labels matter less than one question you can ask about any service sold under them: what will this do that good SEO does not already do? For Google, the honest answer is very little. For other assistants, it might cover checking that their crawlers can reach your site and tracking whether they name you.
Which One to Work On First: Six Real Examples
The difference is easier to apply to a situation than to a definition. Here is what to work on in the cases that come up most for a small business:
| Situation | Work on | Why |
|---|---|---|
| Your site is new and ranks for nothing yet | SEO basics: indexed pages that each answer one real customer question | Google's AI features draw on pages that are indexed and eligible for a snippet, so an unindexed page cannot be cited. |
| An agency quotes an "AEO package" built on llms.txt, chunked pages and special schema | Skip those line items | Google's guide says none of the three is needed to appear in its AI features. |
| A page has plenty of impressions, almost no clicks, and an AI Overview sits above it | Make the page worth the click: the full worked answer, not just the definition | Pew found clicks on traditional results fall from 15% to 8% of visits when a summary appears. |
| A customer says they found you through ChatGPT | Check that robots.txt does not block OAI-SearchBot | OpenAI says sites that opt out of OAI-SearchBot are not shown in ChatGPT search answers. |
| You want to know whether Google's AI features show your pages | The Generative AI performance report in Search Console | It is Google's own report and it is free, so check it before paying for a tracking tool. |
| Someone suggests posting about your business across forums to get mentioned by AI | Answer real questions under your own name, or skip it | Google says seeking inauthentic mentions "isn't as helpful as it might seem." |
The pattern: anything that helps a real reader helps on both. Anything that only exists to be read by a machine is the part Google says you can leave out.
Aziz's take: If someone quotes you a separate monthly fee for AEO on top of SEO, ask them which line in Google's own guide their work goes beyond. For Google, there isn't one. What genuinely changed is that a summary now answers the easy version of most questions, so the page that still earns the click is the one that goes further: the worked number, the real example, the decision the reader still has to make.
Why It Matters for a Small Business
You do not need a second budget line. For a business of one, the useful version of AEO is the same work as good SEO: pages that answer your customers' real questions in full, kept indexed and eligible for a snippet, checked in Search Console every month. Add one robots.txt check for the assistants your customers use, and you have covered what the engines themselves say matters.
Before paying for any AEO tool or retainer, put it through the same test as any other channel: what it costs for each customer it brings in. Our guide to customer acquisition cost shows how to work that out. And because AI summaries can answer a question without sending anyone to your site, a channel you own, like an email list, is worth more than it was.
Aziz's take: Write the page you would want an AI to quote, then make sure a human still has a reason to click it. Those two goals pull in the same direction far more often than the AEO pitch decks suggest.