If you've ever wondered how ChatGPT-style apps can suddenly "know" about your company's internal documents, product manuals, or legal files without being retrained, the answer is almost always RAG — Retrieval-Augmented Generation. In this post, we'll break down what RAG is, why it exists, and walk through the full pipeline step-by-step with a real example. 1. What is RAG? Retrieval-Augmented G