See whether the assistants name your brand when buyers ask about your category, which pages they cite, and what to change when the answer belongs to someone else.
LLM SEO is the work of getting a large language model to name and cite your site when someone asks it a question in your category. The difference from classic SEO is not the tactics, which overlap more than the vocabulary suggests. It is the measurement. There is no numbered results page to check, no index you can query, and no console reporting impressions. The only way to know where you stand is to ask the models real questions and read what comes back.
Three acronyms are circling the same problem, and they are used loosely enough that it is worth being specific about which one you mean:
Term
What it covers
Where you see the result
LLM SEO
Being named and cited by the assistants themselves
ChatGPT, Gemini, Perplexity, Claude
GEO Generative engine optimization
The broadest of the three: any generative answer surface, including search results that carry one
The above, plus Google AI Overviews
AEO Answer engine optimization
Being the answer to a specific question. Predates the current models and applies to featured snippets too
Snippets, voice answers, AI answers
In practice the work overlaps almost completely, because all three reward the same things: pages a crawler is allowed to fetch, claims stated plainly near the question they answer, and corroboration on sites the model already reads. What differs is the surface you measure, and that is what decides which tool you need.
The five LLM visibility tools in Metric Vault
Each one answers a different question, and they are meant to be run in roughly this order: find the prompts, measure where you stand, see who is being cited instead, watch it over time, and fix the pages.
Prompt and Question Research
The starting point, because you cannot measure a surface until you know what is being asked. It surfaces the real questions buyers put to assistants in your category, and shows whether your brand appears in the answers to each one. The output is a list of prompts worth caring about, split into the ones you already win and the ones you never enter.
Visibility Overview
Your score out of 100, with the evidence next to it. It sends real category questions, ones that never mention you by name, to every configured engine, then reports how often you were named, how early in the answer you appeared, and what sentiment came with the mention. The bands run from Invisible at the bottom to Dominant at the top, and a zero is reported plainly as a real finding rather than smoothed into a low number.
AI Citation Tracker
Mentions and citations are not the same thing, and the gap between them is where the traffic goes. This shows which engines cite your domain as a source, on which answers, and which domains are being cited in your place. That list of rival sources doubles as a placement target list: those are the pages already trusted for your questions.
Prompt Tracking
The closest honest equivalent to a rank tracker for an assistant. It re-runs a fixed set of prompts through the live engines, reports your win rate per prompt and per engine, and shows the trend, so a slip is something you are told about rather than something you notice months later. There is no numbered position to track, so it tracks presence and where in the answer you land.
GEO Audit
The page-level half, and it is free and needs no account. It reads a URL the way an answer engine does and scores the signals that decide whether a page can be cited at all: whether the crawler is allowed in, whether the body survives without JavaScript, whether the claims are structured, and whether an llms.txt exists. It returns a ranked fix list with the weight behind each item, so you know which change is worth making first.
Two more free tools sit alongside it and answer narrower questions: the AI Visibility Checker and the AI Citation Audit. All three run without an account.
A 30-day LLM SEO plan
Thirty days is enough to find out where you stand and remove the blockers. It is not enough to build authority, so the goal here is a baseline and a shortlist, not a transformation.
1
Days 1 to 5: find out whether you are readable
Run the GEO Audit on your five most commercially important pages. Check that your robots.txt does not block GPTBot, OAI-SearchBot, ChatGPT-User, ClaudeBot or PerplexityBot, which are separate agents that can be allowed or blocked independently. Confirm the body text is in the HTML the server returns rather than assembled afterwards by JavaScript. Fix anything here first: no amount of content work matters while a crawler is being turned away at the door.
2
Days 6 to 12: establish the baseline
Run Prompt and Question Research to get the real questions, then Visibility Overview to get the score and the evidence behind it. Write the number down. The point is not the score itself, which will be low for most sites, but having something to compare against in a month.
3
Days 13 to 20: find out who is being cited instead
Run the AI Citation Tracker and read the list of domains cited for your questions. Some will be competitors. Many will be forums, roundups and independent reviews, which is the uncomfortable part: those are placements you earn rather than pages you publish.
4
Days 21 to 30: fix and start tracking
Work down the audit's fix list by weight rather than by ease. Rewrite the pages that answer a tracked question so the answer sits in the first sentence after the heading, not four paragraphs in. Then put the prompts you care about into Prompt Tracking, so the next month measures itself.
Expect movement to be slow and uneven. You are waiting on a recrawl and then on corroboration elsewhere, so a month is a baseline and a direction, not a verdict.
Frequently asked questions
What are LLM SEO tools?
LLM SEO tools measure and improve whether large language models name and cite your site when someone asks a question in your category. A classic SEO tool checks your position on a results page. An LLM SEO tool checks whether you appear in the answer at all, which engine said it, how early in the answer you were named, and which domains were cited instead of you. The measurement has to come from real prompts sent to the live models, because there is no ranked list to read and no index to query.
Is LLM SEO the same as GEO or AEO?
They overlap and the names are used loosely. GEO, generative engine optimization, is the broadest: being surfaced by any generative answer surface, including Google's AI Overviews. AEO, answer engine optimization, is about being the answer to a specific question, and predates the current models. LLM SEO is the narrowest of the three in practice: the assistants themselves, ChatGPT, Gemini, Perplexity and Claude. The work overlaps heavily, because all three reward the same things: pages a crawler can read, claims stated plainly, and corroboration elsewhere.
Can you actually track rankings inside ChatGPT?
Not rankings in the Google sense, because there is no numbered list. What you can track is presence and position within an answer, measured across a fixed set of prompts and repeated over time. Metric Vault's Prompt Tracking does this: it re-runs the same prompts through the live engines, reports your win rate per prompt and per engine, and shows the trend. That is the closest honest equivalent to a rank tracker for an assistant.
How long does LLM SEO take to show results?
Weeks rather than days. The page has to be recrawled, and a claim usually has to be corroborated somewhere else before a model will lean on it. Fixes that remove a blocker, such as a robots.txt rule shutting out GPTBot, or a body that only renders in JavaScript, can move faster because they unlock crawling rather than build authority. Treat it as a trend to watch, not a change to deploy.
Do I need to pay to start?
No. The GEO Audit, AI Visibility Checker and AI Citation Audit are free public tools that need no account, no card and no credits, and they are enough to find out whether an assistant can read your pages at all. The tracking tools inside the app, Visibility Overview, Prompt and Question Research, the AI Citation Tracker and Prompt Tracking, run on credits, and the free plan lets you see the product before deciding.
How is SEO for LLMs different from Google SEO?
The work overlaps far more than the vocabulary suggests, and most of what makes a page rank on Google also makes it quotable by a model: a crawler can reach it, the claim is stated plainly, and somebody else says the same thing about you. Three things genuinely differ. There is no ranked list, so position becomes "were you named, and how early". There is no console, so the only measurement is asking the models real questions and reading the answers. And corroboration counts for more, because a model synthesising an answer leans on what several sources agree on rather than on the single best-optimised page.
Which LLM optimization tools actually work?
The ones that query the live engines and keep the raw answer. Anything that infers your standing from a cached index or a keyword database is guessing at a surface that does not work like an index. The practical test before you buy: ask whether it sends real prompts, whether it stores the verbatim response so a score change comes with its evidence, and whether it covers more than one engine. If it fails any of the three, it is reporting a number you cannot check.
Do I need an LLM SEO agency?
Probably not to start, and it is worth knowing what you would be buying. The measurement is something you can run yourself in an afternoon: save the prompts your buyers actually ask, see which engines name you, and read what they say. The part that takes real work is the fixing -- writing the pages, earning the third-party mentions a model leans on, getting technical blockers cleared. If you have people who can do that, an agency mostly adds reporting. If you do not, hire for the writing and the outreach rather than for a dashboard, because the dashboard is the cheap part.