This Article covers the different roles available and how to assign them to team members.
Difference in Roles:
Administrator: Will have access to everything with exception of the billing area.
Standard User: Will only have access to the application that they've been assigned to.
1. As the Company Owner, you'll have permissions to go into Settings > Members > Edit User
2. When you click on Edit User you'll be brought up to the user page where you can select what type of role you want the user to have: