Phase 6 – Video 4 | What is RAG in AI? Retrieval Augmented Generation Explained Clearly

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Phase 6 – Video 4 | What is RAG? (Retrieval-Augmented Generation) In this video, we explore one of the most important architectural patterns in modern AI systems: Retrieval-Augmented Generation (RAG). Large Language Models are powerful, but they do not have access to private or updated knowledge. This limitation leads to hallucination and unreliable responses in real-world systems. In this lecture, we understand: Why LLMs hallucinate Why prompt engineering is not enough Why fine-tuning is not always the solution What RAG actually changes in AI system design How modern enterprise AI systems use RAG This is part of Phase 6 – Agentic AI & Advanced AI Systems. https://www.youtube.com/playlist?list=PLCqaMncDwYwm4VJw9zp95zNZZxDh9MqfS