Forehand high serve is used more in singles than doubles. A good high serve forces your opponent to the back court. The aim of the high court is to get the shuttle drop into the backline in your opponent service box.
You should aim for depth and height so that your shuttle can’t be intercepted. Using a forehand grip, take a balance stance at the centre of the court.
Weight transfer from the back foot to the front foot followed by the racket head moving forward.
The wrist will bend from the back and then straighten as it strike the shuttle hard. Hit through the shuttle and allow the racket momentum to pronate a relax forearm on the follow through.
Note that the impact takes in front and at the side of the body. Be alert and prepared for the next shot.
Watch this simple and basic video to learn on the forehand high serve.