Elasticsearch 7 and Elastic Stack - In Depth and Hands On! - Term Frequency/Inverse Document Frequency (TF/IDF)

The video tutorial explains the concept of an inverted index, a key mechanism in search engines. It describes how search engines like Elasticsearch use inverted indexes to map search terms to documents. The tutorial also introduces the concept of relevance using TFIDF, which stands for term frequency times inverse document frequency. This method helps determine the importance of a term within a document compared to its occurrence across all documents, aiding in ranking search results by relevance.

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