Macbeth learns about Lady death after the audience does. What literary technique does Shakespeare use by doing this?

Shakespeare uses dramatic irony by letting the audience know about Lady Macbeth's death before Macbeth does. This creates a sense of suspense and anticipation, as the audience waits to see how Macbeth will react to the news. It also allows the audience to see how Macbeth's grief affects his character and his decisions.