What does polonius mean by brevity is the soul of wit?

In Hamlet, Polonius's line "brevity is the soul of wit" means that being brief and concise is the essence of cleverness and intelligence. Polonius advises his son Laertes to speak succinctly and to the point, rather than rambling on endlessly. He believes that brevity is a sign of wisdom and wit, as it demonstrates the speaker's ability to distill complex ideas into a few well-chosen words.