You can use your license to setup group leads for your clients or business partners.
You just have to be an admin in his or her group because it’s only admin that can approve new members to the group.
You know, group leads work when you approve new members and a moderator status cannot approve new members.
Secondly, as an admin you would be able to setup the group onboarding questions the right way in case the client has not done so.
I hope this answers your questions.