What is the significance of the meter signature in music composition and how does it impact the overall structure of a musical piece?

The meter signature in music composition indicates the number of beats in each measure and the type of note that receives one beat. It helps establish the rhythmic feel of a piece and guides the overall structure by organizing the timing of notes and creating a sense of pulse or groove. Different meter signatures can evoke different emotions and styles, influencing the flow and energy of the music.