A metronome is a device that produces a steady beat or pulse, helping musicians keep time while practicing or performing. It typically emits a clicking sound at regular intervals, which can be adjusted to different speeds, measured in beats per minute (BPM). This tool is essential for developing a sense of rhythm and timing in music. Metronomes can be mechanical or digital. Mechanical metronomes use a pendulum to create the beat, while digital metronomes offer various features, such as different sounds and visual indicators. Both types are valuable for musicians of all levels, from beginners to professionals, including those who play instruments like the piano or guitar.