This whole act all in all is one of the most important acts in the book I think. We have one test going in to see If Hamlet really loves Ophelia, then we have another test to see if Claudius really is the murderer or the king. We also have talk of Hamlet being sent away to England. And now, Polonious is dead! There are so many new and unexpected things happening, we don't know what's going to really happen next.