1. Now, launch the flow app, tap the Buttons tab that's located at the bottom of the page, and tap the button that represents the button flow you wish to trigger:
    Overview image
  2. See the progress while the flow runs:
    Overview image
  3. Finally, the page updates, indicating that the button flow has completed:
    Overview image

That's all there is to running a flow.

You should now receive the push notification, indicating that the email has been sent.


Source: Microsoft