What is meant by the team chorus?

If you mean the TERM chorus, then there are many different answers.

Originally, Chorus was an integral part of Greek theatre, intended to represent the voices of the community in response to the actions of the individual characters on stage. Before Aeschylus, the Chorus was often an almost liturgical voice in a very religious stage in which ritualized actions were likely intended to placate the gods or at least impose some sort of order on an often chaotic world. With Aeschylus, especially in the Oresteia, the Chorus became fragmented into sometimes differing voices, providing a number of responses to what was going on in the dramatic action. Usually, the Chorus was a moral voice.

By the time of Shakespeare, the Chorus had become a much more straightforward narrative device, used to summarize the action that was to come so as to prepare the audience for the events, act by act. The famous "O for a muse of fire" Chorus that introduces Henry V sets up the entire plot for the play that follows.