Icarus Works
LLM SEO

Make ChatGPT, Claude & Gemini cite you.

LLM SEO is how your brand earns citations inside ChatGPT, Claude, Gemini, and Perplexity — not just a ranking nobody clicks through from an AI summary.

TL;DR

LLM SEO is the practice of optimizing your website and content so large language models — ChatGPT, Claude, Gemini, and Perplexity — select and cite your brand when answering questions in your category. Unlike Google SEO, which targets crawlers and rankings, LLM SEO targets extraction: structured, answer-first content a model can confidently quote.

No audit required. See plans → and start tracking your LLM citation share in minutes.

The first question every client asks

What Is LLM SEO and How Does Optimizing for Large Language Models Differ from Google SEO?

Google SEO wins a blue-link ranking a user must click. LLM SEO wins the citation inside the answer — your brand name spoken or shown before any click happens. Google crawls for relevance signals; ChatGPT, Gemini, Claude, and Perplexity extract for quotability. Same content, radically different optimization target.

In Google search, you compete for position on a results page. In ChatGPT, Gemini, or Perplexity, you compete to be named in the answer itself. If a model doesn't cite you by name, you don't exist for that query — there is no scrolling down to page two of an AI response.

Google SEO wins
A ranked link
User must click through
LLM SEO wins
The cited answer
Named before the click

What Signals Do LLMs Use to Decide Which Brands to Cite in Their Answers?

LLMs select brands to cite based on entity clarity — how consistently your name, category, and attributes appear across your site and the web — plus content extractability (answer-first blocks, schema), training data presence, and off-site authority signals like press coverage, reviews, and trusted third-party mentions. E-E-A-T still matters, just differently.

  • Entity clarity — consistent name, category, services, and audience stated across every source
  • Answer-first content — self-contained paragraphs ChatGPT, Claude, or Gemini can lift and quote cleanly
  • Structured data — FAQ, Organization, and Service schema that make your content machine-readable
  • Off-site authority — press, directories, reviews, and expert roundups that corroborate your entity
  • Crawl access — robots.txt and llms.txt not blocking AI bots like GPTBot or ClaudeBot

How to Identify the Customer Questions Your Audience Is Asking AI Assistants

Start by asking ChatGPT, Perplexity, and Gemini the questions your customers would naturally ask about your category. Supplement with "People Also Ask" results, site search logs, sales call transcripts, and support tickets. These conversational, specific prompts are the exact inputs LLMs use — and the content gaps you need to close.

Unlike keyword research for Google, prompt research for LLMs should capture full-sentence, intent-rich questions: "What's the best tool for…", "Who specializes in… for [audience]?", "How do I choose between X and Y?" Map each prompt to your funnel stage and build answer-first content around the highest-value gaps.

What Content Changes Make Your Pages More Extractable and Citable by AI Models?

Lead every page with the direct answer. Write a 40–60 word self-contained response immediately below a question-shaped heading, then add supporting detail below. Use question-based H2s, bullet lists for steps, tables for comparisons, and clear factual sentences an LLM can extract and quote without ambiguity or additional context.

  • Question H2s matching how buyers actually talk to ChatGPT, Claude, or Perplexity
  • Lead-with-the-answer paragraphs — the quotable response appears first, not buried in the third paragraph
  • Bullet and numbered lists for steps, criteria, and comparisons AI can chunk cleanly
  • FAQ sections on every page with FAQ schema markup to reinforce machine-readable Q&A pairs
  • Factual, verifiable sentences — avoid vague marketing claims; LLMs quote specifics

See where ChatGPT and Gemini name you today.

Run a free AI visibility check, or skip it and jump straight into your LLM citation command center.

What Structured Data and Schema Are Most Important for LLM SEO?

FAQ schema is the single highest-impact addition for LLM SEO — it gives ChatGPT, Gemini, and Perplexity machine-readable Q&A pairs to extract directly. Layer in Organization schema for entity clarity, Service schema for your offering, and Article or HowTo where the format fits. Implement these before anything else.

  • FAQPage schema — the most directly useful for LLM citation; Q&A pairs any model can read
  • Organization schema — establishes your entity: name, URL, description, social profiles
  • Service schema — clarifies what you offer and who you serve
  • Article / HowTo schema — adds context for long-form content and step-by-step guides
  • Speakable specification — signals which sections are the quotable, answer-first passages
Every engine, one strategy

Which AI platforms matter for LLM SEO — and do they differ?

Each LLM selects sources differently, but a single entity-strong, answer-first, schema-rich, well-cited site wins across all of them. Per-engine prompt-testing and reporting reveal where your citation share is strongest and where gaps remain — so you fix the right things, in order.

EngineHow it selects sourcesWhat we optimize for LLM SEO
ChatGPTTraining data + live browsing (Bing-backed)Entity clarity, answer-first content, FAQ schema, off-site citations
PerplexityReal-time retrieval, cites inlineLead-with-answer structure, crawl access, factual density, stats/tables
Google AI OverviewsIndexed content + E-E-A-T + schemaTechnical foundation, FAQ/HowTo schema, BLUF summaries
GeminiGoogle knowledge graph + GBPKnowledge panel, entity truth docs, structured data
ClaudeTraining + some retrievalE-E-A-T, clean factual structure, verifiable precision
What you get

A system that makes you the answer LLMs cite.

Every engagement turns your site into the source ChatGPT, Claude, Gemini, and Perplexity trust. We research the prompts your buyers ask, build extractable content around them, close entity and schema gaps, and track citation share per engine — so you can see exactly where you're winning and where to push next.

01
Prompt map
The buyer prompts your customers ask AI, organized by intent and funnel stage.
02
Answer-first content
Pages engineered to be extracted by ChatGPT, Gemini, Claude, and Perplexity.
03
Entity + schema
Consistent entity data and structured markup AI systems rely on to trust and cite you.
04
Citation tracking
Your citation rate per LLM, per prompt set, reported monthly with competitor benchmarks.
Measurement

How to Measure LLM SEO Progress Without Traditional Rankings or Search Console Data

Track your LLM SEO progress by testing a fixed set of buyer prompts across ChatGPT, Claude, Gemini, and Perplexity monthly. Record citation rate (how often you're named), citation position, and sentiment (named vs. recommended). Branded-search lift and self-reported lead source are useful proxies when direct attribution isn't yet possible.

Metric
Citation Rate
% of tested prompts naming your brand per engine
Metric
Position
First named vs. secondary mention in the answer
Metric
Sentiment
Named in passing vs. actively recommended
Metric
Proxies
Branded-search lift, lead self-reports, referral patterns
The method

A system, not a guess.

01
Discover
Map buyer prompts and test citation baseline across ChatGPT, Claude, Gemini, and Perplexity.
02
Optimize
Build answer-first content, add schema, and close entity gaps across your site and off-site.
03
Deploy
Publish live, verify AI crawler access, confirm indexing, and launch off-site amplification.
04
Measure
Re-test prompt set monthly, track citation movement per engine, report the trend.
FAQ
How quickly do LLM SEO changes show up in AI answers?

Answer-first rewrites, schema additions, and FAQ updates typically begin influencing citations within 4–12 weeks as AI crawlers re-index and signals propagate. Prompt-testing across ChatGPT, Gemini, and Perplexity gives you early feedback before full attribution is clear.

Does LLM SEO replace traditional SEO?

No. Traditional SEO builds crawlability, authority, and the technical trust that ChatGPT, Gemini, and Perplexity rely on to find and evaluate your content. LLM SEO layers extractable structure and citation signals on top of that foundation — both disciplines work together.

Which schema types matter most for LLM SEO?

FAQ, Organization, and Service schema are the highest-priority starting points. They give large language models structured, machine-readable signals about what your brand is, what it offers, and which questions it answers — reducing the ambiguity that blocks citations.

How do I check whether AI crawlers can access my site?

Review your server logs for AI bot user-agents — GPTBot (OpenAI), ClaudeBot (Anthropic), and Google-Extended (Gemini). Check your robots.txt and llms.txt files to confirm you haven't accidentally blocked them. Allowing these crawlers is essential for citation-building.

Find out if ChatGPT, Gemini, and Perplexity are citing you.

Run a complete LLM citation audit — or skip it and start free in your AI visibility command center.