In order to become a great dunker, there are a few key things that you need to focus on. First, you need to make sure that you have a strong and explosive vertical jump. This can be accomplished by doing plyometric exercises and weight training specifically designed for increasing your vertical jump.
Secondly, you need to have excellent timing and coordination. This means working on your jumping technique so that you take off at the precise moment in order to reach the height necessary to dunk the ball. You also need to make sure that you coordinate your arms and legs so that they work together in order maximize your jumping power.
Finally, it is also important to have good hand-eye coordination so that you can accurately aim for the basket when dunking the ball. You can practice this by trying to dunk different objects into different sized baskets from various distances away.
By focusing on these three areas, you will be well on your way to becoming a great dunker!