As you can see, you set a screen for the player setting the ball screen.
This is great because it creates space for the player setting the ball screen. It puts the defender in a recovery position from the start.
Not only does the defender have to cover distance, they have to cover distance on a delay.
If the defender tries to hedge, they are often out of position. As the video shows, your ball handler can turn the corner or pull up for a jump shot. The roll to the basket by the screener can also be wide open.
If the defender stays near the basket, it gives your ball handler open shots in the lane.
And if the defense collapses, you can kick out to open shooters on the perimeter.