If you use a Google Pixel phone and are not using the Quick Tap feature, you're missing out on a cool trick. The Quick Tap feature allows you to take screenshots, play and pause media, show notifications, open Google Assistant, and more. To enable this feature on a Pixel 4a or later device, launch the Settings app and go to System > Gestures > Quick Tap to start actions.

On this page, you'll see the various actions you can execute by double-tapping the back of the phone. If you updated your phone to Android 13, you can use this feature to turn on the flashlight.
To get more quick tap actions or use this feature on non-Pixel devices, use a third-party utility called TapTap. You can download the app from GitHub and follow the steps to install and use the app on your device.