Roles can be used to create groups of users to make it easier to assign resources to multiple users. Navigate to Security->Roles.
Select the Create option.
Set a name for the role, the first tab displayed will then allow you to assign users, the entry here allows for auto filtering of the users based on the content entered and you can then select the users to be added to the role.
Once added the user is displayed in the list.
The Permission tab allows assignment of the various permissions that you wish the users in this role to have.
Once selected the permission is added to the table
The Options tab provides two extra options that can save some time configuring if they are needed. All Permissions add all of the permissions, and All Users add all user accounts.
Select the Save option.
The new permission is added to the table.