What is the point of IV.ii of William Shakespeare's play Romeo and Juliet?

There are
two goals in IV.ii:

1. : Shakespeare likes
   giving his audience a break, and he typically uses his low-class or peasant characters to
   deliver some sort of comedic break, especially during his tragedies. In the first half of IV.ii,
   Capulet's interactions with the servant are meant to lighten the mood,...