GraphRAG, an advancement over retrieval-augmented generation (RAG) systems, integrates knowledge graphs with large language models (LLMs) to enhance the accuracy and explainability of AI-generated responses. By using knowledge graphs, GraphRAG can process complex queries that require multi-hop reasoning, offering improved knowledge representation, scalability, and reduced hallucinations compared to vector-based RAG systems. The architecture involves constructing a knowledge graph from raw data, processing user queries, and using LLMs to generate responses. This approach addresses the limitations of traditional RAG systems, such as inaccurate retrieval and limited context understanding, by providing a structured repository of factual information that underpins response generation. GraphRAG is particularly beneficial for applications requiring complex reasoning, factual accuracy, and rich contextual understanding, making it suitable for fields like financial analysis, legal document review, and healthcare. Various GraphRAG architectures, including static, dynamic, and hybrid models, cater to different use cases, with the choice depending on the domain and data dynamics. As research progresses, GraphRAG is expected to expand into multimodal data and domain-specific applications, solidifying its role as a pivotal technology in AI.