A database server is a specialized computer system that stores, manages, and provides access to databases. It allows multiple users and applications to retrieve and manipulate data efficiently. Database servers use a structured query language (SQL) to perform operations like adding, updating, or deleting data. These servers can handle large volumes of data and support various types of databases, such as relational databases and NoSQL databases. They are essential for applications that require reliable data storage and quick access, making them crucial in industries like finance, healthcare, and e-commerce.