How prominently a brand or website is referenced by large language models like ChatGPT, Perplexity, and Google Gemini.
LLM visibility refers to how often and how prominently a brand, product, or website is mentioned or cited by large language models (LLMs) such as ChatGPT, Perplexity, Claude, and Google Gemini when responding to relevant queries.
As more buyers use AI assistants to research products and vendors — rather than Google — being mentioned in AI responses has become an important new dimension of brand visibility. A brand that consistently appears in LLM responses to category queries ('what are the best B2B SEO agencies') gains exposure to high-intent researchers outside of traditional search.
LLM visibility is influenced by: the volume and quality of content published about your brand on the web (LLMs are trained on web data), citations in authoritative publications, your presence in datasets that LLMs reference, and structured data that helps AI systems understand your brand's category and capabilities.
Tracking LLM visibility requires different tools than traditional SEO — tools like Profound, Otterly, and Indexed's own LLM Visibility Checker monitor how often and in what context AI tools mention your brand.
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