What does the little circle that blinks on digital watches do?

The little circle that blinks on digital watches, often referred to as a "blinking dot" or "flashing indicator," typically serves as a visual cue for various functions. It may indicate that the watch is in a specific mode, such as timekeeping or alarm setting, or signal that a feature is active, like a stopwatch. In some models, it can also denote notifications or alerts. Overall, its purpose is to provide users with feedback about the watch's status or settings.