Shakespeare changed literature by creating deep and interesting stories with complex characters. He added many new words and phrases to the English language, making it richer and more expressive. His way of writing, especially his use of rhythm and poetry, made his plays more powerful. He also used techniques like soliloquies and dramatic irony, which are still important in theater today. His influence goes beyond books—his stories continue to inspire movies, plays, and popular culture, proving that his work remains important even now.