A tap gesture refers to a simple action of touching or tapping an object, usually on a touchscreen device, to perform a specific action or initiate a command. Full definition
One of the best ways to interact with your lock screen notifications is through the use of double tap gestures or ambient display functionality. (android.gadgethacks.com)
Instead of the giant button, it will focus on tap gestures for clicking w / possible tactile feedback. (techguysmartbuy.com)
Meanwhile, a triple tap gesture will provide manual power control. (9to5google.com)