The screen displayed on a smartphone, tablet, or computer when the device is turned on or woken from sleep mode, that requires user authentication, such as a passcode, fingerprint, or facial recognition, to access the device. The lock screen typically shows the current time, date, and essential notifications and may include shortcuts to functions like the camera or flashlight. Customizable with a background image or wallpaper, the lock screen serves as both a security barrier and a quick-access hub for key information and tools.
