User Permissions in Drupal are a set of rules that determine what actions a user can take within the CMS. They are used to control access to content, features, and functions within the system. User Permissions are assigned to roles, which are then assigned to individual users. This allows for a granular level of control over who can do what within the system.

In Drupal, each user permission is represented by a single string of text. This string is used to identify the permission and is used to determine whether a user has access to a particular feature or function. For example, the permission "administer nodes" would allow a user to create, edit, and delete content within the system.

User Permissions are managed through the "People" page in the Drupal administrative interface. Here, administrators can create roles, assign permissions to those roles, and assign roles to individual users. This allows for a flexible and powerful system of access control.

User Permissions are an important part of Drupal's security system. By controlling who can do what within the system, administrators can ensure that only authorized users have access to sensitive data and features. This helps to protect the system from malicious users and helps to ensure that only authorized users can make changes to the system.