System Domains form the highest level of abstraction in iconik. All Users, User Groups, Assets, Collections and everything else come under one System Domain.
The domain often map to an organization or a unit within an organization where the organization might want completely separation between what is stored on iconik.
System Domains are typically created and managed by the iconik Team, though for certain attributes administrators can change values for the domain they administrate.
There is strict separation between System Domains.