Dribbling through traffic as a ball handler is going to force you to keep your head up, make multiple moves in a row, and protect the basketball from defenders. Great ball handlers are able to do all of these things while still being able to read the defense and look for open teammates or open lanes to score.
This dribbling drill is going to help simulate making quick moves back to back. It is going to help the player learn to play low while dribbling the basketball and also to have great footwork as the maneuver through the cones. It is also a great basketball drill that you can use with your guards at practice because it allows you to incorporate a large number of players.