Subscriptions act as an additional restriction option per registration.
From the user's point of view: In the IBI-aws MobileClient, the users themselves select the categories relevant to them for which they would like to receive messages. The predefined categories (e.g. business and activity areas or locations) can be subscribed easily and individually.
From the administrator's point of view: In addition, administrators have special rights and possibilities. They determine the categories available and can remove existing subscriptions or assign new ones. Messages can be restricted to the defined categories and, if required, can also be sent to all users – regardless of the subscriptions.