Question: what is the main purpose of act 3 of the tragedy of macbeth?
Answer: The main purpose of Act 3 is to show Macbeth's troubles and faults like; he was ruthless, arrogant and power hungry. Why does Macbeth decide to kill Banquo? Macbeth feels that he must kill his friend Banquo and the young Fleance in order to prevent the second part from becoming realized.