The BallyHoop Bobber works in conjunction with your BallyHoop to either add buoyancy or add weight to the BallyHoop. This will help keep your BallyHoop afloat in a situation where there is no current and if you are looking to target bait fish that are lower in the water table, you would add water to the Bobber and it will act to sink the BallyHoop to go and get those bait that are below the surface.