Table of Contents
- 1. What Is AEO? Optimizing for Search That Returns Answers Directly
- 2. Where Answers Appear: Five Surfaces and Their Official Rules
- 3. What SEO and AEO Share, and Where They Differ
- 4. Common AEO Tactics, Checked Against the Official Documentation
- 5. How to Measure AEO: the Numbers You Can Get Officially
- 6. Three Pitfalls to Avoid
- Summary
- FAQ
AEO (Answer Engine Optimization) means preparing your pages so that systems that return an "answer" instead of a list of links (Google's featured snippets and AI Overviews, ChatGPT search, Perplexity and others) choose your page as the source of that answer.
The web is full of "AEO techniques," but most of them are never checked against what the companies that return the answers actually say. In May 2026, Google named "AEO" and "GEO" tactics in its guide to AI search and listed what you don't need to do. This article defines AEO, sets out the rules for each place answers appear, and then checks common tactics one by one against the official documentation (original pages checked on October 1, 2026).
1. What Is AEO? Optimizing for Search That Returns Answers Directly
SEO aims to rank high in a list and earn the click. AEO aims to have your page used in the answer that is shown before that list. Because the answer often completes the search on the results page itself, AEO counts not only clicks but also "appearing as the named, linked source of the answer" as a result.
That said, in its guide to AI search (Optimizing your website for generative AI features on Google Search), Google addresses the terms "AEO" and "GEO" and writes that from Google Search's perspective, this is still SEO. It is closer to reality to treat AEO not as a separate discipline but as a name for the part of SEO that focuses on appearing in the form of an answer.
2. Where Answers Appear: Five Surfaces and Their Official Rules
"Answer engines" are often lumped together, but each place that returns answers has its own explanation of how sources are chosen and its own controls for site owners. The table below lists only the rules found in each company's original documentation.
| Where answers appear | How sources are chosen (official description) | Controls available to sites |
|---|---|---|
| Google featured snippets | There is no way to mark a page as a featured snippet; Google's systems elevate a page when they judge it a good answer for the search (Featured snippets) | nosnippet blocks it along with regular snippets (a shorter max-snippet makes it less likely, with no guarantee) |
| Google AI Overviews and AI Mode | Pages that are indexed and eligible to be shown with a snippet (no additional technical requirements) | You can exclude your site with Search Console's Search generative AI control (worldwide since August 31, 2026; see the other article) |
| ChatGPT search | Any public website can appear (to be used in summaries and snippets, don't block OAI-SearchBot, per OpenAI's FAQ) | OAI-SearchBot in robots.txt (even when blocked, a link and title may still appear; use noindex to prevent that) |
| Perplexity | PerplexityBot crawls to surface sites in search results (stated as not used for training, per Perplexity Crawlers) | PerplexityBot in robots.txt (changes can take up to 24 hours) |
| Microsoft Copilot (formerly Bing Chat) | A September 2023 official Bing blog post said content in the Bing index may be included in answers unless you act (Bing Webmaster Blog) | According to that post, nocache limits display to URL, title and snippet, and noarchive excludes content from answers (both remain in regular Bing search) |
What they have in common is that no company describes a way of writing that gets you chosen. What they describe is keeping the entry points (crawlers) open, meeting the conditions to be indexed, and the settings for opting out.
3. What SEO and AEO Share, and Where They Differ
| Aspect | SEO | AEO |
|---|---|---|
| Target | The list of links in search results | The answer shown before that list (featured snippets, AI Overviews, AI search) |
| Outcome | Rankings and clicks | Being shown and linked as the source of the answer, and the clicks that follow |
| Prerequisites | The same: crawlable, indexed and eligible to be shown with a snippet (Google's AI features find pages with the core Search ranking systems) | |
| What content is valued | The same: Google points to helpful, reliable, non-commodity content and states that no special writing style for AI is needed | |
| How to opt out | noindex, robots.txt |
Per-surface controls (table in section 2), which sometimes let you stay in search while blocking only the answer |
| Measurement | Rankings, click-through rate, traffic | Impressions within answers and visits via AI (section 5) |
As the table shows, what differs is where you appear, how you opt out and how you measure; the content that gets chosen is the same as in SEO. Treating AEO as a replacement for SEO sends you looking for shortcuts that don't exist.
4. Common AEO Tactics, Checked Against the Official Documentation
We checked tactics often promoted as "AEO techniques" against the original text of Google Search Central, each company's crawler documentation and peer-reviewed research. The verdicts focus on Google Search; ChatGPT and others are noted only where their companies have published guidance.
| Tactic | Verdict | Basis |
|---|---|---|
| Add FAQPage structured data | No effect (retired) | Google ended FAQ rich results on May 7, 2026 and removed the documentation (since August 2023 they had been limited to authoritative government and health sites), and there is no special schema.org for AI features |
| Add HowTo structured data | No effect (retired) | HowTo rich results were deprecated in September 2023 |
| Break content into small chunks | Not needed | Google states there is no requirement to break content into tiny pieces for AI and that there is no ideal page length |
| Add llms.txt | Irrelevant to Google Search | Google Search doesn't use it, and it neither helps nor hurts rankings (for other AI and this site's measurement, see our llms.txt article) |
| Create a page for every phrasing of a question | Stop (spam) | Google states that mass-producing pages to manipulate AI answers is scaled content abuse |
| Build mentions on other sites | Inauthentic mentions don't help | Google says inauthentic mentions are not as helpful as they seem and that other systems block spam |
| Put the conclusion first and use clear headings | Fine if it serves readers | Google recommends pages organized with paragraphs and headings, while also saying no special writing style for AI is needed |
| Add sources, quotations and numbers | Effective in research | The GEO paper (KDD 2024) found a 30–40% improvement in visibility (a research-setting result; see our LLMO article) |
| Allow AI search crawlers | Required | OpenAI and Perplexity recommend allowing them to appear in search, and Google assumes Googlebot is allowed to crawl |
| Write up your own tests and data | Most important | Google says non-commodity content will likely matter more in the long run than anything else in its guide |
Sources: Google's guide to AI search, Google Search Central documentation updates (FAQ retirement in the May 8 and June 2026 entries), Changes to HowTo and FAQ rich results (August 2023), the GEO paper.
The top half of the table lists things that AEO guides from around 2024–2025 often called "essential." Format-driven tactics such as structured data and chunking either don't work or have been retired, at least in Google Search: that is the answer in the original documentation as of 2026. What remains is keeping the gates open and the substance of your content.
5. How to Measure AEO: the Numbers You Can Get Officially
Whether you were used in an answer was hard to measure for a long time, but in 2026 more official numbers became available.
utm_source=chatgpt.comAnother method, though not an official metric, is to track searches that include your site or product name in Search Console. If people who saw your name in an answer later search for it, it shows up here. But other factors move this number too, so you can't attribute it to AEO with certainty.
Google warns you to be wary of third-party tools that claim to use "internal" Google metrics, because no third-party tool has access to Google's internal ranking or AI systems.
6. Three Pitfalls to Avoid
Pitfall 1: Mixing up training crawlers and search crawlers
If you block all AI crawlers because you don't want to be used for training, you also disappear from AI search answers. At OpenAI, the training crawler is GPTBot and the search crawler is OAI-SearchBot, and they can be set separately. To refuse only training, disallow GPTBot and allow OAI-SearchBot. Anthropic also separates ClaudeBot (training) from Claude-SearchBot (search). The syntax is in the cheat sheet in our LLMO article.
Pitfall 2: Spending time on retired tactics
FAQ and HowTo structured data were long recommended as shortcuts to appearing in answers, but Google no longer shows either rich result. Following older AEO guides means spending time on work that has no effect. Check the company's current documentation before adopting a tactic.
Pitfall 3: Mass-producing pages for every phrasing
Knowing that AI generates several related searches from one question (query fan-out) and creating a page for each phrasing is, according to Google, a violation of its spam policies. Answering one topic with one good page is the right approach for both SEO and AEO.
Summary
The term AEO is useful for keeping in mind that you want to be chosen as the source of the answer now that answers often complete a search on the results page. But the conditions set by the companies that return the answers are the same as the basics of SEO: be crawlable, be indexed, and be worth reading. Check each company's original documentation before adding a tactic. That is the best way not to be swept along by the latest AEO techniques.
FAQ
Is AEO a replacement for SEO?
No. In its guide to AI search, Google writes that AEO and GEO are still SEO from Google Search's perspective. AI Overviews and similar features find pages with the core Search ranking systems, so a page that isn't indexed won't be used in answers either.
Should I still add FAQ structured data?
Not for Google Search. FAQ rich results stopped appearing on May 7, 2026, and the documentation was removed. Google also says you don't need special schema.org markup for AI Overviews or AI Mode. Having an FAQ section for readers is perfectly fine.
Should I block AI crawlers in robots.txt?
It depends on your goal. If you only want to avoid training, block the training crawlers (OpenAI's GPTBot, Anthropic's ClaudeBot) and allow the search crawlers (OAI-SearchBot, Claude-SearchBot, PerplexityBot). Blocking the search crawlers too removes you from that AI's search answers.
How should I measure AEO?
For Google's AI features, the Generative AI performance report in Search Console shows impressions (worldwide since August 31, 2026). For visits from ChatGPT search, filter for utm_source=chatgpt.com in your analytics. Also check your access logs to see whether search crawlers visit.
Are AEO and LLMO the same thing?
They overlap, but the focus differs. AEO is about appearing in search that returns answers; LLMO is about being read and cited by AI in general, such as ChatGPT and Claude. The distinction is laid out in AEO vs LLMO Differences.
Related: AEO vs LLMO Differences / What AI Overviews Changed for SEO/AEO / What Is LLMO
