This chime comes from ChromeOS, the operating system Google builds for Chromebooks, and it plays when a Chromebook is connected to a charger. Because millions of students and everyday users hear it in classrooms and at home, the sound became instantly recognisable beyond its original purpose. Online creators began reusing it in short videos and memes, especially around charging, low battery jokes and the charge your Chromebook trend, where the familiar ding works as shorthand for power returning.