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Retrieval-augmented generation (RAG) is a machine learning framework that enhances the capabilities of large language models by integrating them with external knowledge sources. It works by retrieving relevant information from a database or document repository and then using that context to generate more accurate and up-to-date responses.

RAG is commonly used in roles involving natural language processing, AI development, and data science, particularly where models must provide factually grounded answers without retraining. It is widely applied in industries such as healthcare, legal technology, customer support automation, and enterprise search, where access to current, domain-specific information is critical.

Retrieves context from structured or unstructured data sources
Integrates retrieved content into language model inputs
Improves response accuracy and reduces hallucinations
Supports dynamic knowledge updates without model retraining
Used with vector databases like Pinecone or Weaviate
Commonly implemented using frameworks like LangChain or LlamaIndex

Professionals with expertise in RAG are expected to understand both information retrieval techniques and language model architectures. They typically work with embedding models, vector stores, and prompt engineering to design systems that deliver precise, traceable answers. Mastery of RAG includes optimizing retrieval relevance, minimizing latency, and ensuring system scalability in production environments.

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