What is the purpose of the refrain chorus in a song and how does it contribute to the overall impact of the music?

The purpose of the refrain chorus in a song is to provide a memorable and repeated section that reinforces the main theme or message of the song. It serves as a point of familiarity for listeners and helps to create a sense of unity and structure within the music. The refrain chorus contributes to the overall impact of the music by enhancing its catchiness, emotional resonance, and memorability, making the song more engaging and impactful for the audience.