Answer engine optimization (AEO) is the work of getting your business named when customers ask ChatGPT, Claude, Gemini or Perplexity a question. It covers what those assistants can read about you, what they repeat, and how you check whether they name you.
The term comes from "answer engines", a name for assistants that reply with an answer instead of a list of links. Ask one which bookkeeper to hire in Denver, or which booking app suits a small clinic, and it names a few businesses. AEO is how you become one of them. Below: what changes when customers ask AI, and how an assistant decides what to say. Then what the work looks like, and how to tell whether it is working.
What changes when customers ask AI
Customers used to search, open a few tabs, compare and choose. Now they ask ChatGPT, Claude, Gemini or Perplexity what to buy, and they read one answer. Three things change for you.
The shortlist is written for them. A search results page lists links and lets the reader decide. An answer names a handful of businesses and says why. If you are not among them, the customer may never learn you exist.
The visit may never happen. Some customers click a link inside the answer. Others act on the answer and never visit anyone's site. Your analytics count the visits that did happen. They never show the answers that named someone else.
Other people's pages speak for you. An assistant builds its answer from what it can read: your site, review sites, directories, comparison pages, forums and news. If those sources describe you differently, or not at all, the answer shows it.
The result is a new kind of visibility. You are either in the answer or out of it, one question at a time. AEO is the practice of moving from out to in, and proving that you did.
How an AI decides what to say
An assistant writes its answer in one of two ways. Many answers mix both.
From the web
The assistant searches at answer time, reads the pages it can fetch, and writes from them. It often links the pages it used. This is the path a new page can affect, because a page can be read as soon as the assistant finds and fetches it.
Three things decide whether your page can take part:
- AI is allowed to visit. Your site's settings for visiting bots, kept in its robots.txt file, must let each assistant in. OpenAI's page on its crawlers, read on September 29, 2026, says a site that blocks OAI-SearchBot is not shown in ChatGPT search answers. It can still appear as a plain link.
- The words are in the page. Many AI visitors read a page as your server sends it, so words that appear only after scripts run can be missed.
- A page answers the question plainly. The answer sits near the top, under a heading that matches how a customer asks the question.
From the AI's memory
The assistant answers from what it learned in training, before the conversation began. You cannot edit that memory. It reflects how the web described your business when the model was trained, on your own pages and on everyone else's.
What helps here is consistency. When many independent sources name you for the same thing, in the same words, an assistant has one clear story to repeat. When your site says one price and a directory says another, it has two stories, and it may repeat the wrong one.
What both paths reward
Both reward a page that answers the question directly, facts that agree everywhere they appear, and a site AI can reach and read. None of this is a trick. It is what a good reference page has always looked like, now with a new kind of reader.
What answer engine optimization work looks like
AEO is a loop, not a one-off project. Rankli runs it in four steps, and you can run the same loop by hand.
- Ask. Put the questions your customers ask to ChatGPT, Claude and Gemini every week, and to Perplexity if your customers use it. Record which businesses each answer names.
- See what you're losing. List the questions where AI recommends someone else, and note who it picks instead.
- Publish the answers. Write one page aimed at each question you are losing. Put the answer in the first paragraph, and publish it on your own site.
- Re-ask and show what moved. Ask the same questions again after each page goes live, and compare before and after. Rankli asks 7 and 14 days after each article goes live.
Which questions to start with
Start with the questions customers ask right before they choose. They tend to follow a few shapes:
- "What is the best [your category] for [a need]?"
- "[Your business] or [a competitor]: which is better for [a need]?"
- "Is [your business] worth it?"
- "How much does [your service] cost in [your city]?"
Write them in your customers' words, not your own. A customer asks for "someone to fix a leaking water heater", not for "residential plumbing solutions".
The fixes beside the loop
Two jobs sit beside the loop. First, fix what stops AI reading your site: blocked visitors, words it cannot see, and no clear labels for what you sell. The free AI check reads your site the way an assistant does and scores it out of 100, with no account needed. Second, keep your facts the same everywhere: your name, what you sell, where you work and what it costs. To see AEO from the buyer's side, the free AI visibility checker asks ChatGPT three of your customers' questions and shows who it names.
What a page AI can quote looks like
Assistants lift sentences from pages, so the pages they can use share a shape. You can check your own pages against it today.
- The question is the heading. "How much does a water heater replacement cost in Austin?" tells an assistant what the page answers. "Our services" tells it nothing.
- The answer comes first. One or two sentences that answer the question on their own, before any background or story.
- The facts are specific. A price range and what it includes, the area you serve, your hours, who the service suits. "Affordable" gives an assistant nothing to repeat.
- The page says who is speaking. Your business name, where you work, and a visible date for the last update.
- It agrees with the rest of your site. The same price on the page, on your pricing page and on your listings elsewhere.
A page like this is easier for a person to use too. That is the point: the assistant is reading on your customer's behalf, and it wants what your customer wants.
How to tell if AEO is working
One answer proves very little. Ask the same question twice and you can get different businesses. Change one word and the answer can change again. So measure AEO the way you would measure anything noisy.
- Keep the questions fixed. Ask the same set each time, word for word.
- Ask more than once. Ask each question several times on each assistant, and count.
- Record who wins. For each question, note how many answers named you and who they named instead.
- Tie pages to questions. Know which page answers which question, so a change has a cause you can point to.
- Compare before and after. Look at the same questions before a page went live and after.
Rankli does this for you. 7 and 14 days after each article goes live, it asks that article's questions again, three times on each assistant. Then it shows before and after on the article. On Scale and Agency, it also compares questions it worked on with ones it left alone. A change that moved every question alike is then not credited to your article.
What AEO does not do matters too. No tool decides what an assistant says, and no one can put you in an answer by a set date. You control whether a clear, readable, consistent page exists for each question, and whether you check the result. The AI visibility page shows what Rankli asks and measures each week.
AEO and SEO, side by side
SEO earns a link in a list of results. AEO earns a mention inside the answer. The two share a lot: both reward pages that answer real questions, load fast and say clearly what a business does. They differ in what counts as a win and in how you measure it. A page can rank first in search and still go unnamed in an answer, and the reverse happens too. AEO vs SEO sets the two side by side, from the goal to the cadence.
Questions
Is answer engine optimization the same as SEO?
No. SEO aims for a place in a list of search results, while AEO aims for a mention inside the answer an assistant writes. That is why Rankli measures AEO by asking the assistants directly.
Which assistants does AEO cover?
Any assistant your customers ask, such as ChatGPT, Claude, Gemini and Perplexity. Rankli asks ChatGPT, Claude and Gemini on every plan, and adds Perplexity on Scale and Agency.
How do I know if AI can read my site?
Run Rankli's free AI check. It reads your site the way an assistant does, scores it out of 100 and lists what to fix first, with no account needed.
How long does AEO take to work?
There is no fixed time, because each assistant decides for itself what to say. What you can know is when each check happens: Rankli asks each article's questions again 7 and 14 days after it goes live.
Do I need a new website for AEO?
No. You need a site AI can read and one clear page for each question you are losing. Rankli writes those pages and publishes them to the WordPress, Webflow, Shopify or other site you already have.