Execute HTTP Action :

  This notification method executes a GET request or sends any POST, PUT, or PATCH data to a custom URL. You can execute specific actions on a web server or control any web service that accepts commands via one-time HTTP requests. Whenever a notification of this kind is triggered, the HTTP action is sent.

Execute Program:

 With this notification method, you can execute a script or a program as an external process. It can be a Windows executable file or a BAT, CMD, or PowerShell file. You can use EXE, COM, BAT, CMD, VBS, or PS1 files.