Search has too many new labels right now. SEO, AEO, GEO, LLMO, SXO, AI SEO. Some are useful. Some are agency packaging. Some describe the same work from a slightly different angle.
The practical distinction is simple: SEO helps your page get found and ranked, AEO helps your answer get selected, GEO helps your information get included or cited in AI-generated answers, and SXO helps the visitor trust and act on what they find.
You don’t need a separate strategy for every acronym. You need a website that search engines can crawl, pages that answer real questions clearly, proof that your claims are credible, and a visit that doesn’t waste the reader’s time.
If SEO itself is still fuzzy, start with What Is Search Engine Optimization?. This article focuses on the new vocabulary around answer engines and AI search. If a term below still doesn’t stick, the AI search terms glossary covers more of the vocabulary in one place.
The quick comparison
SEO: Search engine optimization. SEO helps webpages rank in search results. Example: your page ranks for “best accountant for small business.”
AEO: Answer engine optimization. AEO helps a direct answer get selected. Example: your paragraph appears in a featured snippet or voice answer.
GEO: Generative engine optimization. GEO helps your content get cited or included in AI-generated answers. Example: Copilot or Perplexity cites your guide.
LLMO: Large language model optimization. LLMO helps language models describe you accurately. Example: an AI assistant gives the correct service area and offer.
SXO: Search experience optimization. SXO improves the visit after discovery. Example: more searchers stay, read, and contact you.
AI SEO: AI search optimization. AI SEO is broad work for AI-powered search visibility. Example: your site appears across Google AI features and AI assistants.
These terms overlap because search itself overlaps. Google still shows blue links, maps, snippets, product results, AI Overviews, and videos on the same results page. AI assistants retrieve webpages, summarize them, and cite sources. A voice assistant may read a featured snippet. One page can serve all of those formats if you structure it well.
SEO is still the base layer
SEO gets your content into the running. A search engine has to find the page, crawl it, index it, understand it, and decide it deserves to rank.
That means the older work still matters:
- A clean sitemap and crawlable URLs
- Useful pages that match real search intent
- Titles and headings that describe the page honestly
- Internal links between related pages
- Fast mobile pages
- Credible sources, author details, reviews, mentions, or backlinks
Google’s SEO Starter Guide still frames SEO around helping search engines crawl, index, and understand your content. Its newer AI search guidance says much the same thing for generative AI features: use the same fundamentals, don’t block crawling, and make useful content accessible.
That matters because some AI search advice sounds like magic. Add one file. Repeat a phrase. Mention ChatGPT. None of that fixes a page with weak content, blocked crawling, or business facts that don’t match across the web.
AEO is about extractable answers
Answer engine optimization, or AEO, focuses on the answer itself. Can a search system lift a short, accurate response from your page without guessing?
Good AEO content usually has a question-shaped heading followed by a direct answer:
How long does an SEO audit take?
A small website can often be checked in a few hours, while a large ecommerce site may take several days because the crawl, templates, duplicate URLs, and indexation issues need separate review.
The longer explanation still belongs below that short answer. AEO doesn’t mean writing shallow FAQ pages. It means putting the answer where a person and a machine can both find it quickly.
Useful AEO patterns include:
- Definition paragraphs near the top of an article
- Comparison tables
- Numbered steps where order matters
- FAQ sections with real questions, not filler
- Headings that match the wording a searcher might use
- Schema.org structured data where it fits the page type
AEO originally mapped to featured snippets, People Also Ask boxes, voice answers, and knowledge panels. Now it also overlaps with AI-generated answers, because those systems often need the same thing: a compact answer with enough surrounding context to trust it.
GEO is about being cited or represented
Generative engine optimization, or GEO, asks a different question: when an AI system builds an answer from retrieved sources, does your content deserve to appear in it?
The term became popular after the Generative Engine Optimization research paper, which tested ways publishers could increase visibility in generated answers. The paper reported strong gains under its test conditions, but don’t treat that as a promise for your website. Live AI systems vary by model, prompt, location, source selection, and date.
GEO work usually improves the evidence around your content:
- Original examples instead of rewritten basics
- Source-backed claims
- Named authors or clear business ownership
- Current product, service, pricing, and location details
- Consistent facts across your site, profiles, directories, and reputable mentions
- Content that can be crawled without JavaScript or login barriers
The citation part matters. If an AI answer says “according to…” and links to a source, the user can check it. Bing has even started reporting AI citation visibility through AI Performance in Bing Webmaster Tools, which is a sign that AI citations are becoming something site owners can measure.
LLMO is the same family as GEO
LLMO means large language model optimization. It usually refers to helping language models discover, understand, and describe your business correctly.
The phrase is loose. Some people use it as a synonym for GEO. Others use it for brand representation across AI tools: what ChatGPT, Copilot, Gemini, Claude, or Perplexity says about a company, product, person, or category.
For most site owners, the work is straightforward:
- Use the same business name everywhere
- Keep your about page, contact details, service pages, and schema current
- Publish clear descriptions of what you do and who you serve
- Correct stale or wrong information on major third-party profiles
- Earn mentions from sources a search system could reasonably trust
LLMO gets murky fast if someone treats it like a ranking formula. Large language models don’t all retrieve information the same way, and many answers change from one prompt to the next. You can make your information cleaner and easier to verify; you can’t force every model to repeat your preferred wording.
SXO is what happens after the click
Search experience optimization, or SXO, deals with the visitor’s experience after they find you.
A page can win the click and still fail. Maybe it loads slowly on mobile. Maybe the answer is buried under a long intro. Maybe the page promises pricing in the search result but hides every useful detail behind a contact form. Searchers notice that mismatch, and search engines get plenty of indirect signals that the page didn’t satisfy the query.
SXO work includes:
- Matching the title and meta description to the page content
- Answering the core question early
- Making navigation and calls to action obvious
- Keeping mobile layouts readable
- Reducing popups, layout shifts, and slow-loading scripts
- Showing trust signals near decision points
SEO and conversion work meet in this part of the journey. A restaurant page, for example, should make hours, location, menu, booking, and reviews easy to find. A software comparison page should help the buyer understand fit, limitations, and cost without playing hide-and-seek.
What about AI SEO?
AI SEO or AI search optimization is the safest umbrella term because it doesn’t pretend the field has one settled method. It can include SEO, AEO, GEO, LLMO, structured data, prompt tracking, AI citation reporting, and content updates for AI-heavy search results.
Be careful with AIO. Different people use it to mean AI Optimization, Artificial Intelligence Optimization, or AI Overview optimization. That makes it less useful unless the person defines it.
Common mistakes
Treating every acronym as a separate service. If the same page needs crawlability, answer formatting, source-backed claims, and a better mobile experience, splitting the work into four labels doesn’t help much. Fix the page.
Writing only for snippets. A paragraph that answers one question may win a featured snippet, but the full page still has to satisfy the reader after the click. Shallow answer pages are easy to copy and rarely build trust.
Assuming AI visibility means no clicks matter. Zero-click searches are real, but many searches still lead to visits, calls, bookings, demos, and purchases. Visibility without a useful next step is mostly vanity.
Overvaluing llms.txt. An llms.txt file is a proposed convention, not a proven AI citation lever. Google says it doesn’t use llms.txt for Search or its generative search features. Publish it only if it takes minutes and doesn’t distract from the real work.
Practical next step
Pick one article on your site that already gets impressions in Google Search Console. Open it and check four things:
- Does the first section answer the main question directly?
- Do the headings match real follow-up questions?
- Are factual claims backed by experience, examples, or sources?
- Does the mobile page make the next action obvious?
If the answer is no, rewrite that page before chasing another acronym.
FAQ
Is GEO replacing SEO? No. GEO depends on much of the same foundation as SEO: crawlable pages, useful content, authority, and clear facts. The difference is the output you’re trying to appear in: an AI-generated answer instead of, or alongside, a ranked webpage.
Should every blog post have an FAQ section? No. Add an FAQ only when it answers real follow-up questions that don’t fit cleanly into the main flow. A thin FAQ with repeated wording can make a page worse.
Can structured data guarantee AI citations? No. Schema can help search systems understand a page, but it doesn’t force a citation. Use structured data because it accurately describes the content, not because someone promised a shortcut.
What should a small business do first? Fix the basics: crawlability, accurate business details, useful service pages, strong local profiles, and clear answers to the questions customers ask before contacting you. That work helps classic SEO and AI search at the same time.