A growing share of your customers no longer ask Google for a list of links. They ask ChatGPT which web agency to use, ask Perplexity to compare aircon companies, or read the AI answer at the top of Google and never scroll past it. Hundreds of millions of people use these assistants every week, and Google's AI answers now appear across billions of searches a month.
That creates a new question for every business: when an assistant answers a buying question in your industry, are you in the answer? Getting there has a name, generative engine optimisation, or GEO. This guide explains how answer engines choose their sources and the practical work that makes your business quotable. All of it is work we build into client sites, so this is written from practice rather than theory.
What GEO actually is
Traditional SEO competes for a position in a list of links. GEO competes for a place inside the answer itself, either as a named recommendation or as a cited source. The assistant writes a paragraph, and your business is in it or it is not. There is no page two.
The encouraging part is that GEO is not a replacement discipline with a new bag of tricks. Assistants choose sources using signals you mostly already control: whether your pages can be read cleanly, whether they contain liftable answers, whether your business facts are consistent across the web, and whether normal search already considers you credible.
How answer engines choose who to quote
When an assistant needs current facts, it searches, reads the top results, and composes an answer from the passages it trusts. That has two direct consequences. First, ranking well in normal search remains the front door, because pages the search index ignores rarely get read at all. Second, the passage matters as much as the page. Assistants lift the clearest, most self contained explanation they find, not necessarily the first one.
Study after study of AI citations points at the same qualities: content structured with clear headings, direct answers near the top, questions answered in full, structured data that labels what things are, and a business that looks like the same entity everywhere it appears. None of this is exotic. It is legibility, applied consistently.
Write answers, not just pages
The single highest value habit in GEO is the answer block: a forty to sixty word paragraph near the top of a page that answers the page's core question completely, in plain sentences, with the business named. Assistants quote passages, and a passage that stands alone is easy to quote. Every guide on this site opens with one, including this guide.
Definitions work the same way. If your industry has terms customers ask about, define them cleanly and early. And genuine FAQs, the questions people actually send you on WhatsApp, give assistants ready made question and answer pairs in exactly the shape they need.
Structured data does the introductions
Structured data is a label layer machines read: this is a business, this is its name and address, this is an article, these are FAQ answers. It does not make writing better, but it removes doubt about what everything is, and machines reward certainty. The schema types that matter for most businesses are Organisation, Article for guides, FAQPage for question sections, and Breadcrumb for structure.
Alongside schema, plain clean HTML matters more than it has in years. Content hidden behind scripts, popups or heavy page builders is content an AI reader may simply never see. If a page cannot be read by a machine with the styling switched off, it is not fully in the game.
Your business facts must match everywhere
Assistants cross check. If your website, your Google Business Profile, your socials and the directories that mention you disagree about your name, your services or your location, you become harder to recommend with confidence, and confidence is the whole product an assistant is selling.
Fix the boring things once: identical business name everywhere, one canonical description of what you do, the same address and phone number in every listing, and profiles that link back to your site. This consistency is invisible to humans and load bearing for machines.
About llms.txt, honestly
You may have heard of llms.txt, a proposed file that gives AI systems a clean summary of your site. The honest position in 2026: published measurement studies show the big AI crawlers request it rarely, a tiny fraction of their visits, and no major AI company has committed to using it in production search. The hype ran ahead of the evidence.
We still add one to the sites we build, including our own, because it costs minutes, cannot hurt, and developer focused AI tools do read it. Just refuse to pay anyone who sells llms.txt as the secret to AI visibility. The real work is the content, the structure and the consistency above.
SEO still carries GEO
Because assistants lean on search indexes to find sources, everything in our guide on ranking higher on Google works double duty here. The service pages, the reviews, the speed, the links from real organisations: these earn positions in search, and those positions are what answer engines read first.
Think of it as one funnel with a new mouth. SEO gets your pages found and trusted. GEO makes them quotable once they are read. A business that does both is recommended in the AI answer and ranked underneath it, which is exactly where you want to be while your competitors decide whether AI search is real.
The GEO checklist
On every important page: a forty to sixty word answer block at the top, one clear question answered per section, headings that say what sections contain, and FAQs drawn from real customer questions. Across your site: Organisation, Article and FAQPage structured data, clean readable HTML, and pages that load fast.
Across the web: identical business facts everywhere, a complete Google Business Profile, genuine reviews, and mentions from real organisations in your industry. Then test it. Ask ChatGPT and Perplexity the questions your customers would ask, see who gets recommended, and read what those businesses publish. That gap is your to do list. We build every item on this checklist into our client sites from day one, and our process page shows exactly where each one happens.
