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BM25 Explained: The Algorithm Behind Modern Search

This story is from 2026-09-16. It is preserved in the archive; the latest stories are on the live feed.

In the last post, we covered TF-IDF: the foundational technique for turning text into numbers and scoring how relevant a word is to a document. If you haven’t read that one yet, it’s worth doing first. BM25 builds directly on those ideas, and the motivation for it becomes much clearer once you’ve s…

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  1. 2026-09-16 11:00 · DEV Community — Machine Learning
    BM25 Explained: The Algorithm Behind Modern Search

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