You’ve got all the administrative rights here. This parent role gives you full control over all the members as they join the community. You can invite other members to join the community accept requests from others, or block/remove particular profiles too.
The member directory is a repository of all the community member’s profiles. It’s a quick and easy way to get full information regarding any other community member within minutes. However, the condition is, that the member profile you wish to view must be ‘public’ and visible to all from their end. If the respective member has used ‘Hide’ in their privacy settings, you may not be able to view their profile. Isn’t it simple, useful & amazing at the same time?