This beginner-friendly guide introduces Retrieval-Augmented Generation (RAG), a technique to enhance Large Language Models (LLMs) by integrating external data sources. It covers the fundamentals of AI, LLMs, and RAG, providing step-by-step instructions, examples, and visual aids. The guide also discusses tools like Milvus, Faiss, and LangChain, offering a practical approach to building smarter AI systems.