Why didn't Shakespeare has not introduced Macbeth in the scene 2?

Shakespeare chose not to introduce Macbeth in Act 1, Scene 2 of the play "Macbeth" in order to build suspense and intrigue around the character. By delaying Macbeth's entrance, Shakespeare allows the audience to gradually discover his character through the reactions and descriptions of others before he finally appears on stage, creating a sense of anticipation and mystery.