A no nonsense intro to BM25

About this video

BM25 is a ranking formula for scoring how well documents match a query, and this video breaks down term frequency, document length, the k1 and b settings and a code demo.

Good to know: Technical; includes code

Why watch it

BM25 is the ranking formula behind most search engines, and this unpicks how it works. You get term frequency, document length and what the k1 and b settings do, plus code.