Elasticsearch is a search engine that solves a lot of problems. First, it can provide that smart, intuitive search experience in your application, and that at lighting speed. The secret sauce behind is an inverted index, which is a data structure that basically maps words to the source of the information.Since the data will be laid out in the exact form necessary for searching, it will be extremely fast.We can feed Elasticsearch with any data book, product descriptions, and so on.And that content will be split by word sand used as bricks to build the index. Further, we shouldn't worry about the size of the data, because Elasticsearch can spread its index to multiple machines and grow as our data continues to grow.Additionally, Elasticsearch has an arsenal of features.For instance, it provides a sophisticated process to return the most relevant results.Another popular feature is Faceted search.This allows users to filter results by categories while seeing the counts or other metrics.So users can drill down into the search results or do item discovery.

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