--- title: "Do you need AEO, GEO or LLMO if you already have SEO?" description: "These are overlapping industry labels, not standards. Google says its AI features need no special optimization beyond ordinary SEO fundamentals." url: "https://webleveling.com/blog/aio-aeo-geo-llmo-what-they-mean/" lang: "en" published: "2026-10-20" modified: "2026-10-20" author: "Cal Hewitt" tags: ["ai-search","generative-engine-optimization","seo"] image: "https://webleveling.com/og/blog-aio-aeo-geo-llmo-what-they-mean.jpg" alternates: es: "https://webleveling.com/es/blog/aeo-geo-llmo-que-significan.md" --- # Do you need AEO, GEO or LLMO if you already have SEO? These are overlapping industry labels, not standards. Google says its AI features need no special optimization beyond ordinary SEO fundamentals. ![A brass compass resting on a folded paper map beside a pair of reading glasses on a wooden table.](https://webleveling.com/blog/aio-aeo-geo-llmo-what-they-mean/aio-aeo-geo-llmo-what-they-mean-featured.jpg) A pitch lands in your inbox. It promises AEO, or GEO, or LLMO, and it sounds a lot like the SEO you already pay for, with a new name and a bigger monthly number. You want to know whether AEO vs GEO is a real difference, and whether skipping it means your customers read AI answers that never mention you. The short version: AIO, AEO, GEO and LLMO are overlapping industry labels for getting a business found, understood and sometimes cited in AI-assisted search. They are not standards, and nobody issues a certification for them. Google's own documentation says there are no additional requirements to appear in its AI features beyond sound SEO. That makes the useful question a practical one: what work is being sold, how is it measured, and does your website cover the basics first? **Key Takeaways** **The labels overlap** AEO, GEO, LLMO and AIO are vendor terms with no standards body behind them, so the first job is asking a seller what the term means in their proposal. **Google asks for ordinary SEO** Its documentation says there are no additional requirements to appear in AI Overviews or AI Mode, nor other special optimizations necessary. **One answer is a spot check** Ask a real customer question with your trade and town in ChatGPT and Google AI Mode, log the date, wording and cited domains, and repeat it before deciding anything. **Specifics beat scores** A fair proposal names the engines, the queries, the sampling, the deliverables and the business results it will report, and promises no guaranteed citations. ## The four labels point at overlapping work Each label tries to describe the same goal from a different angle: showing up accurately when someone asks an AI tool or a search engine a question. Google's [AI optimization guide](https://developers.google.com/search/docs/fundamentals/ai-optimization-guide) in 2026 recognizes AEO as "answer engine optimization" and GEO as "generative engine optimization," and describes both as terms used by third parties, not Google ranking systems or official products. Usage varies from one seller to the next, which is why the same acronym can describe different work in two different proposals. What each label usually means | Label | Usually stands for | Typical meaning in a pitch | | --- | --- | --- | | AEO | Answer engine optimization | Improving visibility in direct answers from search engines and assistants | | GEO | Generative engine optimization | Improving the chance your content is represented or cited in generative answers | | LLMO | Large language model optimization | Helping language-model systems understand and represent a business or subject | | AIO | AI optimization, or optimization for Google AI Overviews | Depends on the vendor, so ask which one | A few cautions come with the vocabulary. GEO also gets used for geography and geolocation work, so a pitch that says "GEO" could mean something else entirely. Standards bodies such as [ISO](https://www.iso.org/standards.html) and the [W3C](https://www.w3.org/standards/) issue no definition or certification for any of the four. The terms are familiar inside the industry. A 2025 On Marketing [survey of 250 U.S. marketing professionals](https://www.onmarketing.ai/wp-content/uploads/2025/10/Trends-in-AEO-2025.pdf) measured awareness of GEO and LLMO. That is marketer awareness, which is a different thing from how many customers search these words. ![A small stack of unopened envelopes beside a closed notebook and a pencil on a worn wooden desk.](https://webleveling.com/blog/aio-aeo-geo-llmo-what-they-mean/ai-terms-unopened-pitches.jpg) Each pitch uses a different acronym; the work behind it is what you compare. ## Google says ordinary SEO covers its AI features Google's [AI features documentation](https://developers.google.com/search/docs/appearance/ai-features) states: "There are no additional requirements to appear in AI Overviews or AI Mode, nor other special optimizations necessary." Your pages need to be crawlable, indexable and eligible to appear with a snippet. They also need to follow Search policies and be useful, reliable and written for people first. Google adds that its AI features draw on indexed web content, using retrieval-augmented generation and a technique called query fan-out, where one question becomes several related searches. There is no guaranteed inclusion or citation, so anyone promising one is promising something Google does not offer. Several popular add-ons also have a plain answer. Google's guidance says no special schema, no \`llms.txt\` file and no particular way of chopping content into small chunks is required for its generative AI features. It also says an \`llms.txt\` file is not needed for Google Search. Structured data still has its normal job of supporting ordinary Search features when it matches what is visible on the page. Academic work on [generative engine optimization](https://webleveling.com/services/generative-engine-optimization/), such as this [arXiv paper](https://arxiv.org/abs/2311.09735), has measured visibility changes in controlled experiments. A controlled test on certain engines is a research result, and it gives you no formula that works across Google, ChatGPT, Bing, Gemini and Perplexity. ![A tidy row of three wooden filing boxes with blank paper labels on a bare shelf.](https://webleveling.com/blog/aio-aeo-geo-llmo-what-they-mean/ai-terms-filing-boxes.jpg) Crawlable, indexable pages are the filing system every AI feature starts from. ## ChatGPT Search and Copilot find sources by searching the web Other assistants work in a similar spirit. OpenAI's [ChatGPT Search help page](https://help.openai.com/en/articles/9237897-chatgpt-search) says ChatGPT may search the web automatically, rewrite your question into targeted queries and use search partners. It then shows citations with links to the sources. OpenAI also warns that citations can be incomplete, outdated or incorrect, and its [announcement of ChatGPT Search](https://openai.com/index/introducing-chatgpt-search/) describes the same linked-citation design. Microsoft describes Copilot in [its support article on web search](https://support.microsoft.com/en-us/microsoft-365-copilot/how-web-search-works-in-microsoft-365-copilot-chat-and-agents). Copilot generates a short Bing query from your prompt, uses the results to ground its answer and shows a Sources button that lists the query and the sources it used. It may send only part of a long prompt to Bing. Put plainly, these tools read the open web through search. A page that search engines can find, read and trust is the page they have to work with. Each tool picks sources in its own way, so a good showing in one is a signal and never a verdict on the rest. ## Ten minutes with one customer question shows where you stand Before you pay anyone, run a quick check on your own business. Choose one real question a customer would ask, with your trade and your town in it, such as "Who installs \[your service\] in \[your town\]?" Then work through these steps: 1. Open ChatGPT with web search turned on and ask the question. 2. Ask the same question in Google AI Mode. 3. Write down the date and the exact wording you used. 4. Note whether your business is named, whether what it says is accurate, and which domains are cited. 5. Ask again with your business name in the question, and once more without it. Look at what appears next to your name. Your website, your Google Business Profile, directories, review sites and third-party pages can all show up as cited sources, and each one tells you something about where the answer came from. Treat one answer as a spot check, not a performance score. Responses change with location, account, language, device, date and wording, so a missing mention on one afternoon is a reason to look again, not proof of permanent invisibility. Run the same question again next month and keep the log. A short log with dates is worth more than a screenshot of a single lucky result. ![A closed laptop beside a lined notepad holding faint pencil marks and a mug on a kitchen table.](https://webleveling.com/blog/aio-aeo-geo-llmo-what-they-mean/ai-terms-spot-check-log.jpg) A dated log of the same question beats one screenshot. ## A fair vendor answers these questions in writing Once you know what the assistants say about you today, you can judge a proposal against it. Ask for written answers to these: - **Engines and queries**: Which engines are included, and which exact customer questions are tracked? - **Sampling**: How often are results checked, given that answers change from run to run? - **Measurement**: Are mentions, links, citations, accuracy, referral traffic, leads or revenue counted, and what is the starting baseline and report format? - **Deliverables**: Is the work technical fixes, content changes, new pages, digital PR, listings, structured data, monitoring or strategy only? - **Ownership and data**: Who owns the work, are all edits disclosed, and does the vendor use first-party data such as Search Console and Analytics? A fair proposal also stays away from promises. Google's page on [working with third-party SEO services](https://developers.google.com/search/docs/fundamentals/third-party-seo) says services cannot guarantee rankings and that outside tools have no access to Google's internal ranking data. So, a guaranteed AI citation, ranking, mention or lead is a promise nobody can keep. The FTC's [advertising substantiation policy](https://www.ftc.gov/sites/default/files/attachments/training-materials/ftc-policy-statement-regarding-advertising-substantiation.pdf) says advertising claims must be supported by evidence appropriate to the claim, so a seller should be ready to show what stands behind theirs. Be cautious with a proprietary visibility score. It measures whatever the vendor decided to count, on the engines and questions the vendor chose. It is not a count of customers, and it is not a score any platform publishes. Ask what the number was before the work started, and what calls, forms or sales moved alongside it. ## Some businesses need a focused fix, not a new monthly retainer Often the right recommendation is an audit, a focused repair or continued SEO. Google's guide to [whether you need an SEO](https://developers.google.com/search/docs/fundamentals/do-i-need-seo) is a useful read before any purchase. The problems that keep a business out of AI answers tend to be ordinary ones, and they come in different sizes of job. Common gaps and the size of the fix | Gap | What fixing it involves | Job size | | --- | --- | --- | | Important pages are not found | Checking robots.txt, noindex directives, internal links, redirects, sitemaps and hosting, using Search Console | A short correction to a substantial site repair | | Business facts disagree | Listing name, address, phone, hours, service area, qualifications and prices, then matching the website and public profiles | Small to medium cleanup | | Service pages are vague | Clearer copy and headings, process information, locations served, evidence and calls to action | Medium work per page | | Claims lack backing | Case studies, expert review, credible citations, customer proof and legitimate third-party coverage | Ongoing | That order is a practical way to work through problems, not a measured ranking of how often each one happens. Start with whichever your ten-minute check pointed at. If the cited domains were directories with an old phone number, fix the listings before anything else. If your service pages never appeared, rework those pages. It is also fair to stop worrying about a few things. Four acronyms are not four separate systems that each need a website rebuild. Guaranteed mentions are unavailable, and stuffing keyword variations or publishing many near-identical pages invites trouble, since Google warns against [scaled content abuse](https://developers.google.com/search/docs/fundamentals/using-gen-ai-content). ![A small toolbox with its lid open beside a plain folder and a roll of blank tape on a workbench.](https://webleveling.com/blog/aio-aeo-geo-llmo-what-they-mean/ai-terms-focused-fix-toolbox.jpg) A focused repair often does more than a new retainer. Good work leaves marks you can feel: descriptions that are accurate, fewer wrong hours or service claims, stronger pages for real buyer questions, and more qualified calls and forms. Weak work leaves jargon-heavy reports, large amounts of generic text, score changes nobody can explain and claims based on a single engine. **Quiz: Can you read an AI search pitch?** 1. What does Google say about appearing in AI Overviews and AI Mode? - A separate AEO file must be added to the site - There are no additional requirements, nor other special optimizations necessary **(correct answer)** - Only paid sites are cited - Pages must be written in short chunks 2. You asked ChatGPT one question and your business was not named. What does that tell you? - It is a spot check, so log the date and wording and repeat it **(correct answer)** - Your business is permanently invisible - You must buy an AEO package today - The result is an official score 3. Which promise should make you cautious about a vendor? - A named list of engines and queries - A written baseline and report format - Guaranteed AI citations or mentions **(correct answer)** - Use of Search Console and Analytics data ## Frequently Asked Questions About AEO vs GEO **What is the difference between AEO and GEO?** AEO usually means answer engine optimization, aimed at direct answers from search engines and assistants. GEO usually means generative engine optimization, aimed at being represented or cited in generative answers. Both are vendor labels, and the work behind them overlaps heavily. **What is the difference between AIO, AEO and GEO?** AIO can mean AI optimization or optimization for Google AI Overviews, so ask which one a seller means. AEO and GEO are the answer-focused and generative-focused labels. Ask each seller to define the term in writing. **What is LLMO?** LLMO generally means large language model optimization. It is a broad label for helping language-model systems understand and represent a business or subject. **Do these terms replace SEO?** No. Google says foundational SEO remains relevant to its AI features, and ChatGPT Search and Copilot both work from web search results. **Do I need an llms.txt file?** Google says an \`llms.txt\` file is not needed for Google Search. Other tools may behave differently, so the ten-minute check is the better guide for your business. **Can an agency guarantee that ChatGPT or Google will cite me?** No. Google says no inclusion or citation is guaranteed, and third-party services cannot guarantee performance. Ask for a baseline, a repeatable list of customer questions and reporting on calls, forms and sales. ## Final Thoughts AIO, AEO, GEO and LLMO are overlapping labels for the same broad goal, and Google says its AI features need no special optimization beyond ordinary SEO. ChatGPT Search and Copilot find sources by searching the web, so crawlable pages, accurate business information and clear service pages serve every one of them. You can check where you stand in ten minutes, and you can ask any seller for specifics in writing. That gives you a calmer way to read the next pitch. You can tell the labels apart, judge a proposal by the engines, queries, deliverables and results it names, and decide whether website basics come first. The money then goes to work that shows up as real customers, not to a new acronym. If you would like a second set of eyes on a proposal, [Web Leveling](https://webleveling.com/) can read it with you, run the ten-minute check on your business and tell you whether the gap is a focused fix or something larger. Our [generative engine optimization](https://webleveling.com/services/generative-engine-optimization/) work starts from your site and your customers' questions, and it reports calls and leads next to any visibility numbers. We work with small and medium businesses across the country and overseas. [Send us the proposal you received](https://webleveling.com/contact/), and we will go through it with you. If you want background first, read [what generative engine optimization is](https://webleveling.com/blog/what-is-generative-engine-optimization/), [what it costs](https://webleveling.com/blog/generative-engine-optimization-cost/) and [what makes AI search trust a business](https://webleveling.com/blog/what-makes-ai-search-trust-a-business/). ## Terms AI search terms Tap a term to see what it means. **AEO.** Answer engine optimization, a vendor label for improving visibility in direct answers from search engines and assistants. **GEO.** Generative engine optimization, a vendor label for improving the chance content is represented or cited in generative answers. **LLMO.** Large language model optimization, a broad label for helping language-model systems understand and represent a business. **AIO.** AI optimization, or sometimes optimization for Google AI Overviews; the meaning depends on the vendor. **Query fan-out.** A technique where one question is split into several related searches before an answer is built. **Citation.** A link an AI answer shows to a source it used, which can be incomplete, outdated or incorrect. - [Can searchers turn off Google AI Overviews? What to do now](https://webleveling.com/blog/people-turn-off-google-ai-overviews/): Customers can see an AI Overview or regular results. Check your page and Business Profile in both, then compare calls and forms to decide where to focus. - [Query fan-out and the service page: what to add for AI search](https://webleveling.com/blog/why-ai-answers-pull-from-several-pages/): Check whether your service page answers scope, cost, timing, service area, process and next step, starting with what buyers ask before they hire. - [Does FAQ schema get your business into Google AI answers?](https://webleveling.com/blog/does-faq-markup-help-with-ai-answers/): Check what Google says about FAQ markup and AI Overviews, run a ten-minute Rich Results Test, and decide whether a vendor's FAQ add-on is worth paying for.