AEO vs SEO: What's the Difference, and Do You Need Both?

SEO, search engine optimisation, earns your page a position in the list of search results. AEO, answer engine optimisation, earns your page the answer itself: the AI Overview, the featured snippet, the voice reply or the source ChatGPT quotes. Most organisations need both, because answer engines mostly choose from pages that already rank. AEO is the extra work that turns a ranking page into the quoted one.

AEO vs SEO at a glance

	SEO	AEO
Aim	Rank a page for a search	Be the direct answer to a question
Starts from	Keywords and search volume	The questions buyers ask, in their words
Page shape	Comprehensive pages on a topic	The answer in the first two sentences, then the detail
Key technical work	Crawlability, speed, links, internal linking	The same, plus FAQ, HowTo and Service schema and passages that stand alone
Win condition	Top positions, clicks, enquiries	Featured snippet, AI Overview citation, quoted by assistants
Measured by	Rankings and organic traffic	A fixed question set, tracked monthly across answer engines

Why the difference matters now

For years, ranking first was enough. The click followed. Now Google answers many questions at the top of the page with an AI Overview, and people ask ChatGPT or Perplexity directly. A page can rank third and lose to the page the AI chose to quote, even if that page ranks lower.

AEO is the discipline of being the page that gets chosen. It does not replace SEO. It finishes the job.

What AEO adds to SEO

Question research instead of only keyword research

SEO keyword research tells you that “membership CRM integration” gets searched. AEO question research tells you people ask “how long does a membership CRM integration take?” and “what does a membership CRM integration cost?”. Each question needs a clear, quotable answer somewhere on your site.

Answer-first writing

The biggest practical change. Put the answer in the opening sentence or two, then expand. Pages written for older SEO habits bury the answer under context, and answer engines pass them over.

Passages that stand on their own

AI tools extract paragraphs. Write each one so it makes sense without the paragraph before it: name the subject, avoid “this” and “as above”, and include the specific number or fact the reader needs.

Schema that matches the page

FAQ, HowTo, Service and Organization structured data help machines understand what the page contains. It has to match the visible content exactly, or it does more harm than good.

When to focus on which

• You rank for very little: fix SEO first. Technical health and relevant content come before answer formatting.
• You rank on page one but rarely get quoted: AEO is your fastest win. Rewrite those pages answer-first and add the markup.
• Your sector is full of “how”, “what” and “how much” questions: professional services, membership bodies, healthcare, finance and trades all fit this. AEO deserves a regular place in the plan.

A real example

For Ali Legal, a London commercial law firm, we rebuilt the site with service pages that answer the client’s question first and carry structured data. Organic visits grew to around 1,350 a month, and visits from Google AI Overviews went from none to around 455 a month in about six months. That second number is AEO at work: the firm’s pages became the source Google’s AI summaries cited.

And GEO?

GEO, generative engine optimisation, is the third term in the set. AEO gets a page quoted as the answer to a question. GEO gets your organisation named and recommended when an AI writes its own answer, often from many sources at once. We compare that with SEO in GEO vs SEO.

If you want the three handled together, our AEO service runs in the same retainer as SEO and GEO, with one monthly report covering rankings, answers and enquiries.