On this tab, you can see a list of all notification subscriptions of the currently edited user. You can Delete (
) subscriptions in the list, which unsubscribes the user from receiving notifications.
Detailed information about the Notifications module can be found in Developer's Guide -> Modules -> Notifications.
Page url: http://devnet.kentico.com/docs/6_0/contexthelp/index.html?notifications_tab.htm