There are three role levels in Media Pocket admins, defaults, and guests.
Admins: "Super-users" that can see, edit and delete all the assets uploaded to the workspace. Admins control the trash bin, have the right to edit users, manage billing information, create custom fields, create publishing channels and see workspace statistics.
Defaults: "Basic members" that can see all the assets in the projects they belong to. Defaults can upload and manage assets, delete their own assets, create and manage projects, delete their own projects and invite guests. See how to invite guests.
Guest: "Visitor" that can belong to only one project at a time. Guests can only add and edit assets and create sub-projects, but they cannot remove anything nor invite more guests. Guests are not allowed to share assets via link or publishing channels. See how to invite guests.