AEO vs GEO vs SEO: Three Names for the Same Search Engineering Job

What AEO, GEO and SEO actually mean

SEO, search engine optimisation, is the established discipline of making a site rank well in a results page: Google, Bing, the list of blue links and the features around them. AEO stands for answer engine optimisation: structuring a page so a system, from a featured snippet to a voice assistant, can pull out one direct answer to one specific question. GEO, generative engine optimisation, applies the same idea to generative systems such as ChatGPT, Perplexity and Google AI Overviews, which build an answer out of several sources without sending a click to any single page.

In practice, AEO and GEO describe one engineering job from two angles: the real question is which surface is reading the page. National Digital treats this as a single discipline, covered under its AI search visibility work. The engineering that earns a featured snippet is largely the engineering that also makes a page citable inside an AI Overview or an assistant's answer.

The engineering behind AEO, GEO and SEO

Whichever acronym applies, the same pieces of infrastructure carry the work. A page has to render into real HTML before any crawler, human or machine, can read it: a client-side framework that leaves content empty until JavaScript runs defeats a search crawler and an AI fetcher equally. It has to be reachable through a clean sitemap and sensible internal links, with redirects that resolve in a single hop. Its facts need to be marked up as structured data, Schema.org types for organisations, products, FAQs and articles, so a machine can lift a fact out without guessing at its meaning from the surrounding prose. And the same HTML has to be served to a search crawler, an AI Overview fetcher and a chat assistant's retrieval tool: serving a stripped-down or outdated version to one of them is a common cause of an assistant quoting something a business no longer says.

That failure mode shows up often in practice: a site's visible page states the current fact correctly, but an older cached feed, API response or sitemap entry still carries the previous version, and a generative system reading both ends up quoting the stale one. The fix means reconciling every surface that states the same fact so there's only one version left for any crawler to find.

Measurement differs from classic SEO reporting because there's no single dashboard for what an assistant says. The closest equivalent is testing a fixed question set against each assistant on a schedule and checking whether its cited sources match what the business actually publishes, alongside the more familiar Search Console weekly record and crawl health and Core Web Vitals checks that still apply.