From Guild Wars 2 Wiki
Riding Broom is a gizmo that can be used to "fly" around on a broomstick. It does not increase the speed of the player. The five races ride the broom in five different ways.“
Travel: Double-click to equip a bundle that can change how you move around the world.
— In-game description
|Ride Broom||7||Jump on your broom and ride around.|