LLM visibility refers to how often, and how favorably, your brand and content get mentioned or cited by large language model-based tools — ChatGPT, Perplexity, Claude, Gemini, and similar AI assistants — when users ask questions relevant to your business.
This matters because these platforms don't all work the same way. They draw from different source mixes, weigh authority and freshness differently, and some (like Perplexity) actively search the live web for each query while others rely more heavily on training data and periodic retrieval. Improving visibility requires understanding these differences, not applying one blanket tactic everywhere.