Air-Dribbling or Airdrags are used almost every game at the highest ranks. Many famous RLCS goals are Air-Dribbles. Being able to control the ball and carry it into a goal is flashy and useful.
1. Roll the ball up the wall. Make sure it isn't bouncing.
2. Match the ball's speed when rolling towardds the wall. Give the ball some space and hit it on the wall for a pop.
3. Make sure your momentum on the wall is the same as the ball before jumping you might need to slightly brake.
4. Aerial towards the ball in the air.
5. Make sure your first touch on the ball isn't hard. A soft first touch will let the ball "stick" to your car.
6. Carry the ball into the goal.
Hitting the ball and popping it off of the wall is important for many advanced mechanics. How to hit the ball depends on the ball's momentum, direction, and how much boost you have. There are many ways to pop the ball. Some people brake a little bit before hitting the ball to match the ball's momentum; While others create more distance to the ball when rolling it up the wall to create a buffer to match the speed diffrence. It is up to prefrence and many advanced mechanics have multiple ways to do the same thing.