RAG with Hybrid Search: How Does Keyword Search Work?

The article explores the mechanics of keyword search within information retrieval systems, emphasizing the roles of TF-IDF (Term Frequency-Inverse Document Frequency) and BM25 as foundational ranking algorithms. These techniques enhance search relevance by weighting term importance and document relevance, forming the basis for hybrid search approaches that combine traditional keyword matching with advanced ranking methods to improve search accuracy and user experience.