Search no longer ends with ten blue links. A growing share of questions are answered directly by ChatGPT, Gemini, Perplexity, Copilot and Google’s own AI Overviews, and those answers cite a small handful of sources. If your brand is one of them, you earn visibility and trust before anyone clicks. If it isn’t, a competitor gets the mention instead.
Answer engine optimisation (AEO) is the work of making your content the source those systems choose. It builds on SEO rather than replacing it, but it rewards some things more heavily and punishes others faster.
How answer engines choose what to cite
Most AI search products work in two steps. First they retrieve a set of pages that look relevant to the question, usually from a conventional search index. Then a language model reads those pages and writes an answer, citing the ones it drew from. Google says the same principles apply to its own AI features: there are no special requirements beyond being indexed and eligible to appear in Search (see AI features and your website). That has three practical consequences:
- You still have to rank. If a page never makes the retrieval shortlist, it can’t be cited. Strong organic visibility is the entry ticket.
- Extractable beats impressive. The model favours passages that answer the question cleanly in a few sentences. A brilliant insight buried in paragraph nine is harder to lift than a clear definition near the top.
- Corroboration matters. Claims that appear consistently across several trusted sources are safer for a model to repeat. Brands that are mentioned around the web, not just on their own site, get cited more often.
Citations are spread thinly. Pew Research Center found that 88% of the Google AI summaries it examined cited three or more sources, and only 1% cited a single source. You don’t need to be the only answer, just one of the few the model trusts.
Structure pages so answers are easy to extract
Write the way a good reference book is laid out. Each section should open with a direct answer, then expand.
- Lead with the answer. Put a one or two sentence response immediately under each question-style heading, then add detail, examples and caveats.
- Use descriptive headings. “How much does pipe relining cost?” is far more useful to a retrieval system than “Pricing”.
- Prefer lists and tables for comparisons. Steps, criteria, pros and cons and specifications are all easier to quote accurately when they’re structured.
- Define your terms. If you use jargon, define it once in plain English. Definitions are among the most commonly cited passages.
- Keep one topic per page. Pages that try to answer everything tend to be cited for nothing.
Here’s how common page elements compare when an AI system is deciding what to quote:
| Page element | Hard to cite | Easy to cite |
|---|---|---|
| Headings | Clever or vague (“Our approach”) | The question itself (“How long does relining take?”) |
| First paragraph of a section | Background and scene-setting | A one or two sentence answer |
| Comparisons | Spread across paragraphs | A table or list with clear criteria |
| Evidence | Unsourced claims | Original data, named sources, dated facts |
| Author | “Admin” or no byline | Named expert with a bio and credentials |
Give the model reasons to trust you
Answer engines inherit search engines’ caution about who to believe, particularly for health, finance and legal topics. Make the trust signals explicit:
- Name real authors with relevant experience and link to their bios.
- Show first-hand evidence: original data, photos from real jobs, worked examples and case studies.
- Cite primary sources (legislation, standards bodies, official documentation) rather than other blogs.
- Keep facts current. Outdated prices, rules or product details are a fast way to be dropped from answers.
Use structured data and clean technical foundations
Schema markup won’t force a citation, but it removes ambiguity about what a page is and who published it. Organization, LocalBusiness, Article, Product, FAQPage and HowTo markup are all worth implementing where they genuinely describe the content. Beyond schema, make sure pages render without heavy client-side JavaScript, load quickly and aren’t blocked from the crawlers you want to be seen by. Check your robots.txt deliberately: some AI crawlers can be allowed or blocked individually (OpenAI, for example, documents its crawlers separately), and that should be a business decision rather than an accident.
Build mentions beyond your own site
Because models look for corroboration, off-site visibility carries real weight. Coverage in industry publications, expert commentary, listings in reputable directories, reviews and relevant guest posts all increase the odds that your brand appears in the material an answer engine draws on. Consistency matters too: your business name, services and key facts should match everywhere they appear.
Measure what you can
AEO reporting is still immature, so combine several signals:
- Run a fixed set of priority questions through the main AI tools each month and record whether you’re cited, mentioned or absent.
- Watch referral traffic from AI products in your analytics. Our AI citation tracking service automates this across the major engines.
- Track branded search volume, which tends to rise when you’re recommended in answers.
- Monitor Search Console for queries where impressions hold steady but clicks fall, a common sign that an AI Overview is answering on your behalf.
Where to start
Pick the ten questions your best customers ask before they buy. Check who gets cited for each one today, then rebuild your answers to be clearer, better evidenced and easier to quote than theirs. That single exercise usually exposes the gaps that matter most.
FAQ
Is AEO different from SEO?
It’s an extension of it. Answer engines still retrieve pages from search indexes, so rankings, crawlability and authority remain the foundation. AEO adds a focus on how easy your content is to extract, how well it’s corroborated elsewhere and how clearly it signals expertise.
Does schema markup get you cited by AI?
Not directly. Structured data helps search engines understand what a page is and who published it, which reduces ambiguity, but citations are earned by clear, trustworthy answers. Treat schema as hygiene rather than a shortcut.
How do I know if AI tools are citing my site?
Run a fixed list of priority questions through ChatGPT, Gemini, Perplexity and Google each month and record the results, and watch AI referrals in your analytics. An AI visibility audit gives you a baseline across all of them at once.
If you’d like help, our answer engine optimisation service combines technical fixes, content restructuring and digital PR to get your brand cited more often. For the traffic side of the story, see how Google AI Overviews change click-through rates.
