User roles are specific categories assigned to individuals within a system or application, defining their permissions and access levels. These roles help manage what users can see and do, ensuring that sensitive information is protected and that users can perform their tasks efficiently. Common user roles include admin, editor, and viewer, each with different capabilities. By assigning user roles, organizations can streamline workflows and enhance security. For example, an admin may have full control over the system, while an editor can modify content, and a viewer can only read information. This structure helps maintain order and accountability within the system.