The Hawaiian ukulele strap allows ukulele players to reduce the weight of their hands, although most of the ukulele is not particularly heavy, it can be hung directly around the neck, taking part of the weight and reducing the hands. The weight bearing makes it easier and more convenient to play.
When you don't need to play for a while, you don't have to hold the piano with one hand or put it aside. You can directly interact with the audience by hanging your hands. This allows you to manipulate the instrument more flexibly, making the user more worry-free and avoiding taking it. Unstable causes the risk of the instrument falling.