The feature works by using your front-facing camera to track the movements of your eyes and mouth.  So expressions such as a smile or looking off to the left or right can trigger an action on your phone.

Impressively, Android does all of this work directly on your device. Not a single image is sent to Google or stored, and the actions are super quick too.

For now, this only works on Pixel phones on Android 12, but it might one day come to all Android smartphones. How is it useful? The feature is designed to make smartphones easier to use with those who are impaired in some way.  There are many devices out there to control computers with just your eyes, and now you can do the same on Android. The technology might be especially useful for those who are paralyzed and without the ability to speak.