LLM SEO Guide: What It Is And How To Do It In 2026

LLM SEO is the work of making your website easy for ChatGPT, Gemini, Perplexity, Claude and Google’s AI features to find, understand, trust and cite. If your customers now ask an AI assistant instead of typing into a search box, the brands that get named in the answer win attention that never shows up in a classic ranking report.

This guide explains what LLM SEO is, how to do LLM SEO, how to optimize your website for LLM crawling, which tools and agencies are worth considering and how to monitor brand visibility in AI assistants and LLMs. It is written for US businesses, marketers and site owners, and it is based on official documentation from Google, OpenAI and Anthropic rather than guesswork. Updated October 2026.

1. What Is LLM SEO?

LLM SEO is the practice of optimizing your website, content and brand so that large language model (LLM) tools can retrieve your pages, understand them, trust them and mention or cite them in generated answers. The tools it targets include ChatGPT search, Perplexity, Google Gemini, Google AI Overviews and AI Mode, Microsoft Copilot and Claude.

LLM SEO: Who, What, When, Where, Why And How

How LLMs Decide What To Mention

An LLM answers in two main ways. First, it draws on what it learned during training, which is why well-known brands tend to be mentioned even without a live search. Second, many assistants now run a live search, pull relevant passages from web pages and write an answer from them, then link the sources. Google describes its AI features as using the same index and quality systems as Search, with the model breaking a question into several related searches.

That means you can influence LLM answers in two ways: be easy to retrieve and quote right now, and build a brand that is mentioned widely enough to be remembered.

LLM SEO Vs Traditional SEO

For a deeper comparison, read our guides on generative engine optimization, answer engine optimization and AI search visibility.

2. What Is The Equivalent Of SEO for LLM?

The equivalent of SEO for LLMs is LLM SEO, and it goes by several other names. You will see the same idea called GEO, AEO, LLMO and AI SEO. They are not separate disciplines so much as different labels for one goal: showing up in AI answers.

Google’s own position is that optimizing for its AI features is still SEO, not a new discipline. Our comparison SEO vs AEO vs GEO vs AIO vs SXO explains how each label fits together.

3. Why LLM SEO Matters For US Businesses

AI assistants are now mainstream. OpenAI reported that ChatGPT reached 900 million weekly active users in early 2026, and Google said at its I/O event in May 2026 that AI Mode passed one billion monthly users. The United States is among the largest markets for these tools, so your American customers are very likely already asking them for recommendations.

• Referrals are still small but growing fast. SE Ranking’s 2026 research found AI platforms sent about 0.32% of all website traffic, up from 0.02% in 2024. That is small today, and it is rising quickly.
• AI visitors are often high intent. Many people use AI tools later in the buying journey, so the clicks that do arrive tend to be well qualified.
• Mentions shape perception even without clicks. When an assistant names your brand as an option, you gain awareness whether or not anyone clicks.
• Zero-click behavior is rising. More answers are completed inside the AI interface, so being part of the answer matters as much as ranking beneath it.

4. How To Do LLM SEO

Here is the practical process for how to do LLM SEO. Work through the steps in order, because the early ones decide whether the later ones can work at all.

If you want our full take, see our best SEO and AI optimization strategy and AI SEO tips for ranking in AI platforms. For the basics, start with what SEO is and our Google SEO guide.

5. Optimize Website For LLM Crawling

To optimize your website for LLM crawling, make sure the right bots can reach your pages and read them. Google’s guidance is clear that a page must be indexed and eligible to appear with a snippet before it can be shown as a supporting link in AI Overviews or AI Mode. The other assistants have their own crawlers, and many sites block them by accident.

Know The AI Crawlers

The big AI companies separate training, search and user-requested fetching into different bots. Treating them as one is the most common mistake.

Blocking GPTBot only opts you out of OpenAI model training. It does not remove your site from ChatGPT search, which relies on OAI-SearchBot. The same split applies at Anthropic: blocking ClaudeBot does not stop citations that come through Claude-SearchBot and Claude-User.

Example Robots.txt For AI Visibility

This sample allows the search and user bots that produce citations and opts out of training crawlers. Adjust it to your own policy, and always confirm the current names in each company’s documentation.

# Search and citation bots: allow
User-agent: OAI-SearchBot
Allow: /

User-agent: ChatGPT-User
Allow: /

User-agent: Claude-SearchBot
Allow: /

User-agent: Claude-User
Allow: /

User-agent: PerplexityBot
Allow: /

User-agent: Perplexity-User
Allow: /

# Training bots: your choice (this example opts out)
User-agent: GPTBot
Disallow: /

User-agent: ClaudeBot
Disallow: /

User-agent: Google-Extended
Disallow: /

# Everyone else, including Googlebot and Bingbot
User-agent: *
Allow: /

Sitemap: https://www.example.com/sitemap.xml

Technical Checklist For LLM Crawling

• Make content available as text. Important content should be in the HTML, not hidden behind scripts, tabs that never load or images of text. Many AI crawlers do not run JavaScript the way Google does.
• Keep pages fast and stable. Slow or error-prone pages get fetched less reliably. See our guide to fixing Core Web Vitals.
• Submit XML sitemaps and use IndexNow. Faster discovery helps Bing, and ChatGPT search can draw on Bing. See our IndexNow guide and Bing SEO guide.
• Verify Search Console and Bing Webmaster Tools. Start with our Google Search Console guide.
• Use clean internal links. Google lists internal linking as part of making content findable.
• Add accurate schema. It is good practice, but there is no special schema required for AI features. See our schema markup guide.
• About llms.txt: it is optional. Google says it is not needed, and no major AI provider has confirmed using it as a citation signal. Add it if you like, but do not rely on it.

We cover the full audit in AI Crawler SEO: Check AI Bot Access and How To Optimize Your Website For AI Search Engines. You can also read the official docs from Google Search Central and OpenAI.

6. Write Content That LLMs Can Quote

Once crawlers can reach your site, your content has to be worth quoting. AI systems pull short passages that answer a question clearly, so write pages that are easy to lift without losing meaning. A well-known research paper on generative engine optimization from Princeton and collaborators found that adding statistics, expert quotations and cited sources increased visibility in AI answers by up to about 40% in their tests.

• Answer first. Put a clear two- or three-sentence answer directly under each question-style heading, then add detail.
• Define terms plainly. A clean “X is…” sentence is easy for a model to reuse.
• Use specific facts. Name sources, include figures with dates and avoid vague claims such as “we are the best.”
• Publish original value. Original data, case studies, screenshots, testing and real examples give models something they cannot get anywhere else.
• Show first-hand experience. Google’s guidance stresses real experience. Name the author, show credentials and explain how you know what you know. See how to write for E-E-A-T.
• Use comparison tables and FAQs. Many buying questions are comparisons, and structured answers are easy to quote.
• Keep pages fresh. Update important pages with real changes and show the updated date. Perplexity and other live-search tools favor recent content.
• Write naturally. Google says you do not need to chop pages into tiny chunks or rewrite them for machines. Write clearly for people.

7. Build Your Brand Entity And Mentions

LLMs learn which brands belong to which topics from the web as a whole, not just your own site. That makes your brand’s presence elsewhere a core part of LLM SEO.

• Keep your details consistent. Use the same business name, description, address, services and social profiles everywhere. Our Google Business Profile guide helps with local visibility.
• Write a clear About page. State who you are, what you do, who you serve and your proof points. Models pull entity facts from pages like this.
• Collect real reviews. Reviews on Google, industry directories and review sites reinforce trust.
• Earn editorial mentions. Original research, expert commentary and useful tools get cited naturally. See off-page SEO.
• Take part honestly in communities. Helpful answers on Reddit, YouTube and industry forums can be cited by AI tools. Do not spam, and never fake mentions. Google specifically lists inauthentic brand mentions as something to avoid.
• Publish video with transcripts. Video content is increasingly cited in AI answers.

8. Which LLM is best for SEO?

There is no single best LLM for SEO, and the answer depends on the task. The question also has two meanings: which LLM is the best assistant for doing SEO work, and which LLM should you optimize for to get cited. Here is how the main tools compare.

Our advice: use more than one, test them on your own tasks and judge by the quality of the final result. For a deeper side-by-side, read our AI writing tools comparison and the guides to ChatGPT, Claude, Gemini, Perplexity and Microsoft Copilot.

9. Are LLMs good at SEO?

LLMs are good at many SEO tasks and poor at others. Used well, they speed up the work. Used carelessly, they create thin pages and wrong facts.

Treat every LLM output as a draft. Check facts, add real experience and edit for your brand’s voice. Google’s spam policies target scaled, low-value content made mainly to manipulate rankings, however it is produced, so quality and original value matter more than speed. Browse our best AI tools for small businesses for practical options.

10. LLM SEO tool

You do not need a paid LLM SEO tool to start. A free toolkit covers crawl access, indexing, tracking and testing, and many teams only add paid platforms once the basics are working.

For classic SEO software, see the best SEO tools and our Ahrefs review.

11. LLM Visibility Optimization Tools

LLM Visibility Optimization Tools run a set of prompts across AI engines on a schedule and report whether your brand is mentioned, which sources are cited and how you compare with competitors. The category is new and changing fast, so check each vendor’s current features and pricing before you buy.

What To Look For

• Engine coverage: ChatGPT, Google AI Overviews and AI Mode, Gemini, Perplexity, Copilot and Claude.
• Citation and source-URL data: not just whether you were mentioned, but which pages were used.
• Competitor benchmarking and share-of-voice reporting.
• Sentiment and accuracy checks: how the AI describes your brand.
• Country and language options if you target the US and other markets.
• Export or API access so you can build your own reports.
• Honest limits: AI answers change between runs, so look for tools that run prompts repeatedly and show trends.

12. Monitor Brand Visibility Ai Assistants LLMS

To Monitor Brand Visibility Ai Assistants LLMS use, build a repeatable system instead of one-off checks. Because AI answers vary, trends matter more than any single result.

1. Build a prompt list. Write 20 to 50 realistic questions across the buying journey: “what is,” “best,” “vs,” “near me” and “how much.” Include your brand name, your category and your competitors.
2. Test across engines. Run each prompt in ChatGPT, Gemini, Perplexity, Claude and Google’s AI Mode and AI Overviews. Use a clean session where possible.
3. Record what happens. Log whether you were mentioned, whether your page was cited, your position in the answer, the sentiment and which competitors appeared.
4. Repeat monthly. Use the same prompts so you can compare. Run important prompts more than once because answers can change.
5. Track AI referrals in GA4. Segment chatgpt.com, perplexity.ai, gemini.google.com, claude.ai and Copilot traffic, and watch direct and branded search for lift from visits that arrive without a referrer.
6. Check your logs. See which AI bots crawl which pages and fix any blocks or errors.
7. Act on gaps. If a competitor is cited and you are not, study the cited page, then improve your own page with better answers, data and sources.

Sample Tracking Sheet

For a full measurement framework, read How To Measure AI Search Visibility.

13. LLM SEO agency

An LLM SEO agency can help if you lack time, technical skills or the resources to test and improve across several AI platforms. Because the field is new, the quality of agencies varies widely, so ask careful questions.

Questions To Ask Before You Hire

• How do you handle SEO fundamentals, and how do they connect to your LLM SEO work?
• Which AI engines do you track, and how do you measure results across them?
• Can you show real examples of improved citations or mentions, with dates?
• How do you handle crawler access, including robots.txt, firewalls and CDNs?
• How do you earn brand mentions without fake or spammy tactics?
• What will you deliver monthly, and how will you report it?

Red Flags

• Guaranteed citations or rankings. No one controls what an AI model says.
• A strategy built only on llms.txt or special “AI markup.”
• Fake reviews, paid fake mentions or spam posts. These risk penalties and brand damage.
• No mention of traditional SEO or technical health.
• Vague reporting with no prompts, dates or methods.

Learn more in How To Choose An SEO Agency For AEO Visibility and see the best SEO companies for small businesses in the USA. Aik Designs, a web design and SEO agency founded in 2006, also helps businesses prepare their sites for search and AI visibility.

14. LLM SEO Mistakes To Avoid

1. Blocking AI search bots by accident through robots.txt, a CDN or a security plugin.
2. Confusing training bots with search bots and blocking both when you only meant to opt out of training.
3. Relying on llms.txt or other special files as a shortcut.
4. Ignoring Bing. ChatGPT search can draw on Bing, so Bing indexing matters.
5. Publishing thin, unedited AI content at scale instead of useful, original pages.
6. Hiding key content behind JavaScript that crawlers may not run.
7. Faking mentions or reviews. This is risky and against Google’s guidance.
8. Letting key pages go stale with no real updates.
9. Measuring only rankings. You also need prompt tests, referrals and branded search trends.
10. Expecting instant results. LLM SEO is a steady process, not a switch.

15. A 30-Day LLM SEO Action Plan

16. LLM SEO Frequently Asked Questions

17. Conclusion

LLM SEO is not a replacement for SEO. It is SEO with a sharper focus on being crawlable, quotable, trusted and visible wherever people now ask questions. Start by letting the right bots in, make your best pages clear and answer-first, build your brand’s presence beyond your own site and measure with a repeatable prompt list. The brands that do this steadily will be the ones AI assistants mention.

Want to keep learning? Explore the full Aik Designs Anchor Hub for our guides on AI search, SEO tools and digital marketing, or browse the Search Engine Optimization category.