Why witches are present in the mabeth play?

In Shakespeare's "Macbeth," the witches serve as catalysts for the play's central themes of ambition and fate. They represent the supernatural and the moral ambiguity of their prophecies, which tempt Macbeth to pursue power at any cost. Their presence heightens the atmosphere of chaos and foreboding, reflecting the disruption of the natural order. Ultimately, the witches symbolize the dark forces that influence human actions, leading to tragic consequences.