What dramatic functions are served by the Chorus in Romeo and Juliet?Please give me a brief answer. I need it asap. Many thanks.

The Chorus, at the beginning of the play, functions like a
Prologue.  He/she sets the stage for the events, giving background to the feud and also
telling the audience that Romeo and Juliet will settle the feud by killing themselves,
altering the audience that Fate is in control of these "star-crossed
lovers."

He/She appears again at the beginning of Act II
to, dramatically, provide a transition between the Capulet feast that ends Act I and the
scene in Capulet's garden between Romeo and Juliet at the beginning of Act II.  He/she
focuses the audience's attention on the fickleness of Romeo and the part that chance
plays in providing them this occasion to meet and express their love for each
other.

The Chorus, after this, disappears from the play,
something that many people find odd.  This disappearance also leads many theatre
companies to cut The Chorus from the play, having his text in Act I spoken by the
Prince.