RAG: Retrieval Augmentation Generation
LLM platforms (ChatGPT, Anthropic, Gemini, etc) are trained on publicly available data and may have no context about your specific use cases. Retrieval Augmentation Generation (RAG) is a technique to provide the LLM information relevant to the query as needed. This provides the LLM the relevant context to use in its response and reduces the risk of hallucination.