What is Solr?

Apache Solr is an open-source search platform built upon the Apache Lucene search library. It's commonly used to index and search large volumes of text-based data, providing features like full-text search, faceted search, real-time indexing, dynamic clustering, database integration, and rich document handling. Solr is often employed in e-commerce sites, content management systems, and other applications where fast and accurate search is crucial.