Guides
GEO — Generative Engine Optimization — makes a website readable, understandable and citable by AI answer engines like ChatGPT, Perplexity, Gemini and Claude. Where SEO aimed to rank you among ten blue links, GEO aims to make you the source the AI cites in its answer. The ground has shifted: people increasingly read the generated answer without ever clicking, and traffic concentrates on the handful of sites the engines judge worth citing. These guides cover the topic without jargon — what the llms.txt file is, how AI engines choose who to cite, the difference between llms.txt and Q&A schema.org markup — and what you can do, concretely, to go from invisible site to cited source. Direct answers, sourced numbers, actionable steps.
Add an llms.txt on your platformHow to add an llms.txt file and Q&A schema.org markup on your platform (WordPress, Shopify, Wix, Squarespace, Webflow, Ghost, GitHub Pages, Substack and many more) so ChatGPT, Perplexity and Gemini can read and cite your site.See the steps →The state of llms.txt & AI-citabilityOur study on the AI-citability of leading SaaS sites: what they have — and don't — to get cited by ChatGPT, Perplexity and Gemini.Study →Updated · July 5, 2026
What is Generative Engine Optimization (GEO)? A plain-language guide
GEO explained: what generative engine optimization is, how it differs from SEO and AEO, why it matters now, the techniques research shows work, and how to start getting cited by ChatGPT, Perplexity, Gemini and Claude.
Read the guide →Updated · July 5, 2026
How to get cited by ChatGPT: a step-by-step guide
A concrete, step-by-step guide to getting your site cited by ChatGPT: how it picks sources, the seven things to change, the content it lifts most, and why no one can guarantee a citation.
Read the guide →Updated · July 5, 2026
llms.txt generator: how they work and what to look for
How llms.txt generators work, manual vs automatic, minimal vs full, why the file alone isn't enough to get cited, and how Citeable generates the llms.txt plus Q&A schema.org markup from one crawl.
Read the guide →Updated · July 7, 2026
Is llms.txt worth it? The honest 2026 answer
"llms.txt is useless": what the 2026 data actually shows (AI crawlers ignore it, Google says it isn't required for AI Overviews), the one place it still matters (Perplexity + coding agents), and what really makes a site citable — structured data.
Read the guide →Updated · July 5, 2026
GEO vs SEO vs AEO: the difference, and which to prioritize
SEO, AEO and GEO compared side by side: what each optimizes for, where they overlap, a comparison table, and how to decide which to prioritize based on where your traffic comes from.
Read the guide →Updated · July 5, 2026
How to get cited by Perplexity AI
Perplexity-specific GEO: its two-gate source selection, the three signals it values most (freshness, reciprocal sources, extractable structure), and the four actions to prepare your site.
Read the guide →Updated · July 5, 2026
What is llms.txt? The file that lets AI engines read your site
llms.txt explained in plain language: what the file is, where it goes, what it contains, whether AI engines actually read it, and how it differs from robots.txt and sitemap.xml.
Read the guide →Updated · July 5, 2026
How do AI engines pick which sites to cite?
What actually gets a site cited by ChatGPT, Perplexity, Gemini and Claude: the two-stage selection process, the content traits research says get cited, and the numbers behind the shift — with sources.
Read the guide →Updated · July 5, 2026
llms.txt vs schema.org Q&A markup: which one do you need?
The two files that make a site citable do different jobs: llms.txt makes you readable, Q&A schema.org markup makes you quotable. What each one does, and why the answer is both.
Read the guide →Updated · July 6, 2026
Schema markup for Google AI Overviews: what actually helps
Does schema markup get you into Google's AI Overviews? The honest answer: it isn't a confirmed ranking factor, but it makes your content machine-parseable — the trait AI answers favor. Which schema types matter, the FAQ-rich-result honesty note, and how Citeable generates the Q&A markup.
Read the guide →Updated · July 6, 2026
GEO agency vs GEO tool: which should you choose?
GEO agency or GEO tool? A retainer buys ongoing strategy, content and authority-building; a one-time tool buys the technical on-page setup in one crawl. What each does, honest cost ranges, when each fits, and why they're often complementary rather than either/or.
Read the guide →Updated · July 6, 2026
GEO perfect: the complete checklist (what a tool can't do for you)
Generating an llms.txt and Q&A schema is the on-page half of GEO. The other half is off-page and ongoing — deploying the files, building off-site authority, keeping content fresh, earning real E-E-A-T signals, and measuring citations. The honest, complete checklist, including where Citeable stops.
Read the guide →