Most tree stands are commercially manufactured portable models that are designed to be attached to a tree near a game trail or game sign. The primary advantage of portable tree stands is that they can be positioned on a tree with a minimal amount of noise and in a short period of time. Portable tree stands can be safe and environmentally friendly. Commercial stands that are manufactured, certified, or tested to industry standards are best. Homemade stands should not be used. You should follow the manufacturer’s instructions and also practice installing a tree stand at ground level before you go hunting. Portable tree stands come in three basic types: hang-on stands, climbing stands, and ladder stands.