In William Shakespeare’s tragedy “Macbeth,” the character of Banquo plays a crucial role in developing the play’s themes, including the corrupting power of ambition, the contrast between appearance and reality, and the influence of fate and prophecy. Banquo serves as a foil to Macbeth, highlighting the moral choices and consequences that define the play. This essay explores how Shakespeare uses Banquo to illuminate these themes, examining his interactions with Macbeth, his responses to the witches’ prophecies, and his enduring legacy throughout the narrative. Through Banquo, Shakespeare deepens our understanding of the play’s central concerns and the ethical dimensions of ambition and power.