Definition

A large language model (LLM) is an AI model trained on huge text corpora to generate, understand and summarise natural language. GPT, Claude, Gemini and Llama are all LLMs. They power generative engines, AI overviews and chatbots.

Why it matters for SEO

LLMs do not read the web like a crawler. They synthesise information from the sources they consider trustworthy. Optimizing for LLMs falls under GEO and AEO: making sure your brand is quoted in generated answers.

What is at stake for brands

• Audit what LLMs say about your brand (mentions, accuracy)
• Monitor improper use of your brand by third parties in AI content
• Strengthen authority signals: EEAT, press coverage, presence on reference directories
• Protect your online identity: official domain names and consistent information across the web