LLMs, or Large Language Models, are artificial intelligence systems that understand information and generate answers in tools such as ChatGPT, Gemini, Claude, Perplexity and other AI-powered search experiences.
They are relevant to SEO because users are increasingly discovering brands, products and services through generated answers as well as traditional search engine results.
Modern SEO therefore considers not only keyword rankings, but also website structure, content clarity, brand consistency, backlinks and authoritative third-party references that may help AI systems understand and accurately represent a business.