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What is query rewriting and why does it matter?

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Rewriting the user's question into a standalone search query using the conversation context. Follow-up questions like 'and for international?' are meaningless to a search index on their own, and rewriting often improves retrieval more than index tuning.

Reading an answer is not being able to give one. The section that teaches this is Making it actually work, 4 hours of Retrieval-augmented generation.

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