Question: what is the purpose of macbeth act 3 scene 6?
Answer: Macbeth's murder of Banquo, committed to control his fate, has had the opposite effects. Now the thanes see Macbeth for what he is: a tyrant. Macduff, the lord says, has gone to England to meet with Malcolm and try to get the English King Edward and his lords to gather an army to help them defeat Macbeth.