Send Trigger sends a trigger message to the specified object. Any Event Receivers with the Trigger event type on them will fire their actions.
Target object
The object to send the trigger to.
Pro Tip
Triggers are a way to break up and reuse action sequences. If you find yourself reproducing the same sequence of actions over and over, consider moving that sequnece into an object with a Trigger Event Receiver and using Send Trigger action to invoke it from different action sequences.