What is a coda in a song and how does it contribute to the overall structure and impact of the music?

A coda in a song is a concluding section that provides a sense of closure and finality to the music. It typically follows the main body of the song and can feature a different melody or rhythm. The coda contributes to the overall structure of the music by signaling the end of the piece and reinforcing the main themes or emotions. It can also create a lasting impact on the listener by leaving a memorable impression or resolving any musical tension.