User Access control function allows the admin user to define the role based on other typical users of the application. The admin user will be able to defined the role as well accesibility to the other specific users from the application.For better understanding please checkout the flowchart of the overall user access control function provided below:
Settings--> User--> User Roles
From here you can give the role name and label the users on that particular role along with the module access. Also from the user role list you can do edit or make modification in access priority. You can define the group role as well.