Couchbase is a robust and versatile NoSQL document database that is widely used by prominent companies such as LinkedIn, PayPal, and eBay to manage their data layers. It offers the flexibility of using JSON-formatted data, allowing complex and nested structures, which can be stored in unique Buckets. Couchbase provides multiple tools for querying data, including the Query Workbench and Couchbase Shell (CBQ), which support SQL-like N1QL queries, making it accessible for developers transitioning from relational databases. Indexing in Couchbase can be tailored to application needs with options for local and global secondary indexes, including memory-optimized versions for enhanced performance. The database is complemented by extensive language support for SDKs and is production-ready, as evidenced by its adoption by major organizations and its strong community support.