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SEO, GEO and AEO explained
SEO (search engine optimization) helps your pages get found and ranked in search results. AEO (answer engine optimization) shapes content so search features, snippets and voice assistants can give a direct answer. GEO (generative engine optimization) aims for visibility inside AI-generated answers. They share one foundation: crawlable, accurate, clearly written pages.
SEO: being found and understood by search engines
SEO is the oldest of the three and the base for the others. It starts with crawlability and indexing: search engines can reach your pages, a sitemap lists them, robots.txt does not block what it should not, canonical tags settle duplicates, and hreflang connects language versions. Pages must load reliably and read well on a phone.
On top of that sits content that matches what people actually search for, with clear titles, headings and internal links between related pages. None of this is a trick; it is making a site easy for a machine to read and genuinely useful to a person.
AEO: written to be the answer
AEO targets the places where an engine returns an answer rather than a list: featured snippets, answer boxes and voice assistants. The writing habit is answer-first: put the direct answer in the first sentence or two, then explain. Headings phrased as the questions people ask help, as does a short FAQ section.
FAQPage structured data can mark up those questions and answers for machines, but marking something up never guarantees a special result. The content has to be real and visible on the page first.
GEO: showing up in AI-generated answers
Generative engines assemble answers from sources they can read and trust. There is no switch to flip, but the groundwork overlaps with the rest: clear, factual, well-structured pages; consistent facts about who you are, what you do and where, repeated the same way everywhere; JSON-LD structured data that states those facts explicitly; and not blocking the crawlers of the AI tools you want to be included in.
You may also see llms.txt: a plain-text file at the root of a site that summarises it for language models. It is an emerging, non-standard convention, not an official standard, and no engine is guaranteed to read it. If you add one, treat it as a small extra that only repeats what your pages already say truthfully.
What does not work
Keyword stuffing does not work: repeating a phrase unnaturally makes pages worse for readers and is a classic spam signal. Invented facts, fake reviews and made-up credentials are worse, since they are dishonest and engines, both search and AI, are built to discount or penalise them. Hidden text, copied content and mass-produced thin pages fail for the same reasons.
Be wary of anyone who guarantees a ranking or a citation in an AI answer. Nobody controls those systems. What you control is the quality, accuracy and structure of what you publish.
How the three fit together
Think of one foundation with three layers of payoff. Get crawling, speed, structure and correct language markup right; write answer-first content with honest FAQs; and state your facts consistently in text and JSON-LD. Doing that well serves traditional search, direct answers and AI summaries at once.
For a multilingual business, the same work has to be done in each language, with each version accurate rather than machine-pasted. That is how we build the sites we deliver.
FAQ
What is the difference between SEO and GEO?
SEO aims to rank your pages in search results. GEO aims to have your content understood and cited inside AI-generated answers. They overlap heavily, because both reward clear, accurate, well-structured content that crawlers can access.
What is AEO?
Answer engine optimization: writing and structuring content so that search features, featured snippets and voice assistants can give a direct answer, usually with an answer-first sentence and question-style headings.
Does llms.txt help me show up in AI answers?
It might help a little, but there is no guarantee. llms.txt is an emerging, non-standard convention and not an official standard. Accurate, well-structured pages matter far more than the file.
Do I need JSON-LD structured data?
It is not required, but it states facts about your business and content in a form machines read reliably, which helps search and AI systems understand your pages. It must match what is visible on the page.
Can anyone guarantee I will appear in AI answers or rank first?
No. No one controls search rankings or what an AI system chooses to cite. You can improve the quality, accuracy and structure of your content and make it easy to crawl, but outcomes are never guaranteed.