Why do people constantly snap their fingers?

Snapping fingers is commonly used as a form of nonverbal communication or expression of approval or excitement. It can be a way to signal agreement, appreciation, or to show enthusiasm for something. Additionally, snapping fingers can also be used as a rhythmic accompaniment to music or to express impatience or frustration. Overall, snapping fingers is a versatile and commonly used gesture that can convey various emotions or messages in a simple and quick manner.