The phrase refers to activating the light-emitting diode (LED) flash on a mobile device running Google’s Android operating system. This functionality transforms the mobile device into a handheld illumination tool. A user request prompts the system to energize the LED, producing light. Common activation methods include tapping an icon on the screen, using a quick settings toggle, or employing voice commands.
The ability to quickly and easily activate the built-in light source offers significant practical advantages. It provides instant illumination in low-light conditions, proving useful for navigation in the dark, finding objects, or signaling for help. The wide adoption of this feature underscores its value as a readily available utility. Historically, dedicated flashlights were essential tools, but mobile device integration centralizes essential functions into a single device.