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

In music, a chorus is a repeated section of a song that typically contains the main theme or message. It serves as a point of emphasis and often includes the song's title. The chorus contributes to the overall structure of a song by providing a memorable and catchy element that listeners can easily recognize and connect with. It helps to unify the song and create a sense of cohesion and familiarity for the listener.