A role is a collection of privileges that can be assigned to users. It may be desirable to create administrator and operator roles, with different authorization levels. Staff members may be assigned any role that is suitable for their needs, without assigning unnecessary privileges.
The use of roles is considered to be much more secure than the use of shared administrator passwords, for example, giving everyone the root password. Roles restrict users to necessary authorizations only, and also attribute their actions to their individual username in the Logs in Oracle ZFS Storage Appliance Customer Service Manual log.
By default, a role called "Basic administration" exists, which contains very basic authorizations.