There are three types of roles that can be assigned to Team Members by the Admins in Zoho Social:
Portal Admin
When you sign up for Zoho Social, A portal will be auto-generated for you and you will be assigned as the Portal Admin. You will now be able to add and manage Brands and Team Members to your Portal. You can also create new roles, assign them to team members and assign channel permissions (i.e. which members have access to which social channels on a Brand). You will also get access to Brand Settings, where you can add and delete Brands or Members to/from the Brand.
Brand Admin
The Brand Admin is the admin for a specific Brand. They can perform any action within that Brand, including managing social channels and inviting team members to the Brand.
User
A user has default access to all features, but won't be able to manage social channels or add more people to the Brand or Portal that they are part of.
However a Brand Admin or Portal Admin can create new roles and customize the permissions for each member added to the portal.