A paddle is essential when stand-up paddleboarding because it provides the propulsion needed to move across the water. The paddle is used to paddle on one side, then the other, in a rhythmic motion that propels the board forward. It also provides balance and stability when standing on the board. In addition, a paddle allows you to control the direction and speed of your board, and to steer around obstacles in the water. Having a paddle is crucial to being able to effectively stand-up paddleboard and to have a safe and enjoyable experience on the water.