GraphRAG is a powerful retrieval mechanism that improves GenAI applications by leveraging the rich context in graph data structures. Enterprise GenAI systems face challenges in producing trustworthy and reliable results, which are often addressed by Retrieval-Augmented Generation (RAG) architectures. GraphRAG uses knowledge graphs to represent and connect information, capturing not only more data points but also their relationships, to provide more accurate and relevant results. By navigating the graph structure and following relevant relationships, GraphRAG can retrieve information that may not be directly mentioned in the initial set of retrieved chunks, providing a more comprehensive and contextually relevant response. This approach offers several advantages over vector-only RAG systems, including improved explainability, prioritization of pertinent information, and integration of structured and unstructured data. GraphRAG is used in applications and domains that require higher trust levels, such as legal compliance, investment research, biotech, business process support, supply chain, fraud detection, investigative journalism, natural language search, and chatbots.