What is the main task performed by Elasticsearch?

Elasticsearch is a distributed search and analytics system, primarily designed for fast and efficient indexing and searching of large volumes of data.

It enables full-text search, filtering, aggregations, and real-time data analysis. Elasticsearch is often used for logging, monitoring, analytics, and building search engines.

Example: if you have a large number of text documents, Elasticsearch can quickly find all documents containing specific keywords and analyze statistics on them.