what reeason can you think of as to why macbeth is first introduced to us through the witches

Elizabethan's feared the supernatural. The really believed in witches and what they could do. Shakespeare used the witches in the first scene to hook the audience in. The witches, in a sense, foreshadowed Macbeth's personality and his fate. We learn that Macbeth can be manipulated. We are anxious to meet him!