This trigger will fire when a notification is received. You can add additional filters based on the application the notification has come from and the content of the notification text.

By using this trigger in conjunction with the Speak Text action you can speak the incoming notification text.

The prevent multiple triggers option can be used in situations where multiple rapid notification updates occur (more than one in a fraction of a second). For example an app may receive a push notification (which is an incoming notification and will cause a trigger) and then immediately do something in the app to refresh that notification causing another trigger. By enabling this option on a single trigger will fire which in most situations is the desired behavior.