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Tip: RAG (Retrieval-Augmented Generation) can improve LLMs: 1️⃣ Encode query → search vector DB / index 2️⃣ Retrieve top-k docs as context 3️⃣ LLM consumes [query + retrieved chunks] → grounded output ⚡ Benefits: reduces hallucinations, adapts to new domains, and scales knowledge without retraining.