Your users may not wish to receive push alerts for absolutely everything, so they can control this in their account settings:
Furthermore, as the Admin you can globally disable certain alert types from being used:
Third party add-ons may not have very friendly names. All we have is the "content type" and "action" for each alert. This is rarely very descriptive, so to help with this you an customise the phrases displayed:
Disabling Pushover for certain alert types allows you to potentially reduce the number of messages sent via the the service