A subscription defines
For example, you may like to create a subscription that notifies all Administrators via private message when something has been added to the Continua Event Log:
Group
Members of the group will receive the notification, provided that they have an email or XMPP address specified, and so long as they don't have a user-level subscription for the same notification type.
Soucre
The entity that the notification is about. The notifications types available depend on the type of the source that you select.
Notification Types
The types of notification you wish to receive. You may select multiple types.
Publisher
The method that is used to send the notification: Email, XMPP or Private Message. You may need to configure the Publishers before they can be used.