Couchbase is a distributed NoSQL database that offers high performance, scalability, and reliability. It uses a unique architecture called "Hash Sharding" to distribute data across multiple nodes in the cluster. The system supports various features such as views, design documents, and replication for data durability and availability. Couchbase also provides tools for backup, restore, and disaster recovery. The database is designed to be highly available and can handle high traffic and large amounts of data. It supports a wide range of data types, including JSON, binary data, and files. Couchbase has a large community and is widely adopted in various industries. However, it may require additional configuration and tuning to optimize performance and meet specific use cases.