After the activation of the add-on Multiple profiles for vendors, the administrator will find a new role added to the list of user roles in the Roles section of the store’s Admin area (Users > Roles) - the role “Vendor staff”:
This role corresponds to a set of access permissions that enable a user to access the working area of a specific vendor and perform operations in that area on behalf of the vendor. The exact scope of access permissions that a user with this role gets (full or limited) is defined by the vendor.
Note that being the primary feature of the add-on, the role “Vendor staff” may not be removed. If necessary, however, the store administrator can rename it: