Short answer: the difference in AEO vs SEO is the unit being judged. SEO optimises a page so the document gets found and ranked; AEO optimises the same page so a correct, self-contained answer can be lifted out of it and attributed to you. A page can pass the first test perfectly and fail the second, and the reasons are structural rather than editorial: the answer depends on its heading, arrives late, hides in a tab or a script, or hedges instead of stating a fact.

This is the narrowest of the comparisons people ask about. It is about one page, not a programme. For the programme-level view of what carries over from SEO, see GEO vs SEO. For the full how-to, see the AEO working guide. Here the focus is the gap: what a well-optimised SEO page typically gets wrong for extraction, and how to check for it in a few minutes.

AEO vs SEO: the same page, two different tests

An SEO review asks whether a page deserves to rank for a query. An AEO review asks a mechanical question: if an engine cut a few sentences out of this page and pasted them into a reply, would they still be true and still make sense?

SEOA queryis typedPages areretrievedA ranked listis shownThe readeropens your pageUnit judged: the whole document. Success: a position and a click.AEOA questionis askedPages areretrievedPassages areselectedA reply quotesyour passageUnit judged: one passage, read out of context. Success: lifted and attributed.
Figure 1. The same page goes through two different pipelines. Search ends when a reader opens the document; an answer engine selects a passage and writes it into a reply, so the passage is judged on its own. Source: illustrative diagram.

The difference comes from what happens after retrieval. A search engine hands the reader a list and lets them open the document. An answer engine reads the documents itself, selects passages and writes a reply from them, so the passage has to carry its own subject, its own fact and its own date. Put side by side, the two checklists look like this.

ElementSEO checkAEO check
AccessIndexable, canonical, in the sitemapFetchable by the AI search and user agents, with the answer in the raw HTML
HeadingContains the target keywordStates the question in the words a buyer would use
First paragraphSets context and includes the keywordIs the answer
FactsPresent somewhere on the pageWritten as a sentence that names its subject
Structured dataValid for rich resultsAgrees with what the page visibly says
DatesRecently updatedA real published and modified date, not a deploy timestamp
Success looks likeA position and a clickA passage lifted and attributed, recorded separately from whether the brand was recommended

Nothing in the SEO column is wrong. The point is that every row has a version of the page that passes on the left and fails on the right.

SEO habits that quietly break extraction

Headings written for keywords

A heading built around a keyword phrase tells a ranking system what the page is about. It does not tell a retriever which question the passage underneath answers. "Project management software for agencies" is a topic; "Which project management tools handle client billing?" is a question with an answer underneath it.

Introductions written for depth

Pages written to look comprehensive often open with three paragraphs of context before the sentence that answers the question. That sentence may never be in the passage the engine selects. Moving it to the top costs nothing in search and fixes extraction.

Paragraphs that lean on the heading

"It costs less than the alternatives and ships in a week" is fine under its heading and meaningless once cut out. Repeat the subject in the sentence that carries the fact: name the product, the plan or the condition.

Facts tucked into interface components

Tabs, accordions, carousels and widgets are good interface design, and often invisible to a crawler that does not run JavaScript, which describes most AI crawlers. Where this bites depends on the platform. Shopify storefront pages are composed on the server, but app-injected reviews and Q&A blocks arrive client-side. On Webflow, anything an Embed builds at runtime and content loaded by third-party scripts are missing from the published HTML. On HubSpot, HubL templates are evaluated on the server, but forms populate client-side, so offer text written inside a form never reaches such a crawler.

Hedged facts

"Pricing depends on your needs" protects a sales conversation and cannot be quoted as an answer. A page that states the fact, with a date on it, gives the engine something to lift; a page that hedges gives it nothing, and the answer will be built from someone else's page.

Markup added for rich results

Structured data added to win a rich result sometimes describes content the page does not visibly show, such as FAQ entries hidden behind an interaction. For extraction that is worse than no markup, because it points an engine at something the reader cannot find. FAQ schema that works covers the safe pattern.

Platform defaults add two more traps. On WordPress, core emits no schema.org markup of its own, so it comes from themes and plugins, and several of them can each output an Organization or Article node; duplicated or conflicting nodes are the normal failure rather than missing markup. On Shopify, the structured_data filter emits ProductGroup rather than Product for products with several variants, so a validator that insists on Product reports a failure that is not one. In both cases the AEO question is the same: does the markup agree with what the visible page says?

A worked rewrite: one passage, before and after

The habits above rarely appear alone. A typical SEO-era section has a keyword heading, an introduction, a subject carried only by the heading and a hedged fact, all in four lines. The rewrite below uses a hypothetical product, ExampleApp, with placeholders in place of real figures.

BEFORE: WRITTEN FOR SEARCHProject management softwarefor agenciesAgencies juggle many clients at once, andkeeping projects on track is hard. Ourplatform was built with that in mind. It alsohandles billing; pricing depends on your needs.1A topic, not the buyer’s question2The answer arrives in the last line3The subject is “it” and “our platform”4The fact is hedged, so nothing can be quotedAFTER: WRITTEN FOR EXTRACTIONWhich project management toolshandle client billing?ExampleApp handles client billing natively:it creates invoices from the hours trackedagainst each client. Billing is included onplans from [price] per month, as of [date].1The heading is the question2The first sentence is the answer3The product is named where the fact is4A dated statement replaces the hedge
Figure 2. One section rewritten for extraction. Each numbered fix answers the numbered problem on the left; the product, price and date are placeholders, not real figures. Source: illustrative example built from the habits listed in this guide.

Notice what the rewrite does not do. It adds no words to speak of, no keywords and no links. It changes the heading from a topic into the buyer's question, moves the answer to the first sentence, puts the product name into the sentence that carries the fact, and replaces "depends on your needs" with a dated statement. Each of those edits fixes one of the habits listed earlier, and none of them costs anything in search. If the real price varies, say what it varies with and give the starting point, rather than withholding it altogether.

Where AEO and SEO genuinely pull apart

Mostly they do not conflict. There are two real tensions, and both are worth deciding on deliberately.

Answer-first writing versus engagement. Putting the answer in the first sentence can shorten time on page, which some teams still read as a quality signal. Most answers are read without a click, so if your commercial model depends on sessions, being the cited source is a brand outcome rather than a traffic one. Decide which you are optimising each page for, and measure the answer side on the answer side rather than in analytics.

Specific facts versus being wrong later. Stating a number invites it to go stale, which is why so many pages hedge. The answer is a date, not vagueness: a dated fact tells the reader and the engine exactly what is being claimed and when. Content freshness and dates covers how to keep those dates honest.

What carries over unchanged

Everything in the access row of the comparison table is shared work, and it pays twice. A page that cannot be indexed, or that exists under two addresses, is weaker in both systems. On our own site a trailing-slash inconsistency once left 46 pages indexed under two URLs each, splitting 1,980 impressions between the twins; an answer engine faces the same ambiguity about which address to cite. Server-rendered HTML, one canonical URL per page, an accurate sitemap and honest dates all serve search and extraction at once. If a team has time for only one kind of fix this quarter, these are the ones that help on both sides of the AEO vs SEO line.

How to check one page for AEO in five minutes

  1. Fetch the page as a crawler would, with no JavaScript, and look for the sentence that answers the question:
    curl -s -A "OAI-SearchBot" https://example.com/features/billing/ \
  | grep -i "client billing"
    A 403 means something below robots.txt is blocking the agent. A 200 with the sentence missing means the answer is client-rendered, and that counts as a failure, not a pass.
  2. Find the heading that should carry the question. If none of the headings states it, write one.
  3. Read the first two sentences under that heading out of context. If they are a complete, correct answer that names its subject, the page passes. If you had to scroll up to understand them, it fails.
  4. Compare the structured data with the visible page. Every question in FAQ markup should be answered in the HTML.
1Fetch as OAI-SearchBot, no JavaScriptIs the answering sentence in the response?403 / missing403: an edge rule blocks the agentMissing: the answer is client-rendered2Is the question written as a heading?In the words a buyer would usenoWrite the heading as the question3Do two sentences stand alone?Read them with nothing else on the pagenoPut the answer first andname the subject in it4Does the markup match the page?Every FAQ entry answered in the HTMLnoFix the markup or removewhat the page does not showThe page passes the extraction checkall yes
Figure 3. The five-minute check as a flow. The first step needs a real request, because a robots.txt reading cannot show an edge block or a client-rendered answer. Source: the check described in this section.

Nothing on this list is fixed by more links or more words. Each failure is fixed by moving, naming or exposing a sentence that already exists. For the writing technique in more depth, see writing for extraction.

Sources