The bench press exercise is a pretty common exercise, and it used in training for pretty much every sport. It is a great exercise for developing upper body strength, primarily in the chest and shoulders area. A big key to this exercise though is having the correct form. Having the correct form allows the player a strong foundation for developing muscle and strength. Without using the correct form, it sets a low ceiling on the players ability to improve their strength and muscle development, and increases the chance of injury.
This video is going to explain the correct form for the exercise, and also show some repetitions so that you can see exactly what it looks like. Also, remember that as you are doing this exercise, you want to be doing basketball specific training. So don't try to go too heavy, or get caught up in a body builder style workout. You want your exercises to translate over to the court, and help you become a better player.