Duncan gave the title of Thane of Cawdor to Macbeth because
it serves as a reward for Macbeth’s valor. The old holder of the Thane of
Cawdor was given the punishment of death for being a traitor. When Macbeth and
Banquo were on their way back from battle, the two meet the witches, who then
tells Macbeth hat he will be the new Thane of Cawdor and will also be the new
ruler of Scotland.
