What critical task does a database administrator perform concerning security?

A database administrator plays a crucial role in establishing and managing user roles and permissions to ensure the security of the database. This task involves defining who has access to the database and what actions they can perform within it, which is fundamental to protecting sensitive data from unauthorized access and potential breaches. By implementing proper security protocols and access controls, the administrator can mitigate risks associated with data exposure, maintain confidentiality, and ensure compliance with various regulations regarding data privacy. This responsibility is central to the integrity and security of the overall data management strategy within any organization.