A range of events across Gibbon lead to a notification being created for the people involved (e.g. when a student comments on a lesson plan alerts teachers and students in that class). These notifications are highlighted in the Minor Links bar in the Gibbon interface:
Clicking on the Notifications icon (as highlighted above), takes you to the Notifications page, where you can use the icon to action and archive the notification in one go. Archive notifications drop down to the second part of the page. All notifications can be deleted in one go by using the icon above the New Notifications table.
In order to make notifications more obvious, you can enable email notifications via the Preferences page.