A database management system (DBMS) serves several crucial functions, including data storage, retrieval, and management. It enables users to create, update, and query data efficiently through a structured platform. Furthermore, a DBMS ensures data integrity and security, allowing for access control and backup functionalities. It supports various types of data models, including hierarchical, relational, and object-oriented databases, catering to the diverse needs of applications. Overall, a DBMS facilitates seamless data management, essential for businesses relying on accurate and accessible information.