A Large Language Model (LLM) is the foundational AI technology behind engines like ChatGPT, Perplexity, Claude, Gemini, Grok, and Copilot. These models are trained on massive datasets of text and learn to generate human-like responses by predicting what words and concepts should follow in a given context. They power the AI search revolution that is changing how consumers discover and evaluate brands.
LLMs work by processing your question, understanding the intent behind it, and generating a response based on patterns learned during training combined with information retrieved in real time. The models have internal "knowledge" from their training data (which has a cutoff date) and can also access current information through browsing or RAG pipelines. When an LLM recommends a brand, it is drawing on a combination of what it learned during training, what it can find on the web, and its assessment of which sources are most authoritative and relevant.
For marketers and business owners, understanding LLMs matters because these models are becoming primary discovery channels for consumers. When someone asks an LLM "What is the best CRM for small businesses?" the model's response directly influences purchasing decisions. Unlike a Google search where users see multiple options, an LLM might name only two or three brands, making the stakes of being included or excluded much higher.
GRRO helps you navigate the LLM landscape by tracking how different models perceive your brand. Because each LLM has different training data and retrieval approaches, your visibility can vary dramatically across platforms. GRRO monitors all six major LLMs and shows you exactly where you stand with each one, so you can tailor your optimization strategy to the specific models where you have the most opportunity.
Related terms
A search platform powered by AI that generates direct answers and recommendations instead of a traditional list of links.
The technical process AI engines use to retrieve external information and incorporate it into generated responses.
The question or instruction a user gives to an AI engine, which determines what brands and information the engine includes in its response.