How to set up and use Back Tap on the iPhone with iOS 14

While Back Tap is meant to be an accessibility function, the new iOS 14 feature for iPhone is an extremely convenient way to launch apps, run Shortcuts, or any number of things.
Apple built Back Tap to create a simple and easy way to trigger convenient tasks for those with accessibility needs. A quick double or triple tap on the back of your iPhone can be configured to trigger a number of actions, such as opening the Magnifier, or starting VoiceOver when your iPhone is in your pocket. It can eve