LLM SEO: The Complete Guide to Getting Found in AI Search

AI-referred sessions jumped 527% in just five months. ChatGPT's results overlap with Google only 12% of the time. And the brands showing up in AI answers aren't getting lucky — they're following a deliberate strategy built for how large language models actually select and cite content. This is the complete guide to LLM SEO: what it is, how it works, and exactly what to do to get found across every major AI platform in 2026.