The dedicated Nikon compatible HB-37 Lens Hood is specifically designed for use with the Nikon 55-200mm f4-5.6 G AF-S VR.
Lens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens. In addition, since the end of the lens is extended, you also get the added benefit of some extra protection from accidental impact.
