Trigger Event ReplySignal a trigger to finish and process reply data
The Trigger Event Reply must be used for any trigger that requires a reply. It is used to signal to the trigger that it should finish what it is doing, stop waiting and process the reply data sent to it from the Trigger Event Reply.
The Webhook trigger is a good example of when you may want to reply to the trigger. There is an Operation that allows the workflow to reply rather than automatically replying with an HTTP status of 200.