Couchbase is a NoSQL database designed for high performance and scalability. It combines the flexibility of a document database with the power of a key-value store, allowing developers to store and retrieve data in various formats. This makes it suitable for applications that require fast access to large volumes of data, such as web and mobile applications. One of the key features of Couchbase is its ability to handle distributed data across multiple servers, ensuring reliability and fault tolerance. It also supports real-time data synchronization, making it ideal for applications that need up-to-date information. Overall, Couchbase is a robust solution for modern data management needs.