There are three possible actions that can trigger these notifications:
  1. Transactions
  2. Event registrations
  3. Advocacy Action Alerts
You can disable notifications for transactions and still send them for profile updates made as a result of event registrations (or vice versa).  To disable all notifications, all three settings can be set to "false."  If you'd like to make any changes to these notification settings, then please Contact Support and reference this article.