There are two main levels of administrative users in your Organization account:
Super Admin - The highest level of administrative access to your Organization Account. This admin level can restrict specific, granular access to sections of the system for other admins (see Permissions). This admin level can also remove other admin users.
Standard Admin - This level has access to the system as defined by the Super Admin. The admin level cannot set granular access levels of other admins nor remove other admin users.
The Billing Contact on Eventsquid is an internal note for you and Eventsquid administrators in case there is a billing issue and the normal contact cannot be reached.
The Billing Contact on other sites is the main contact should we experience issues processing invoices.