What does Load Bearing Exterior Rack on a vehicle mean?

Load bearing exterior racks (also known as roof racks or cargo carriers) are designed to add additional storage space to a vehicle by attaching to the roof of the vehicle. They are generally made of metal or plastic and are designed to safely carry a variety of items such as luggage, sports equipment, or cargo boxes. The racks are typically secured to the vehicle's roof using mounting brackets or bolts that attach to the vehicle's frame. Some load bearing exterior racks may also include additional features such as cross bars or side rails to provide additional support and flexibility when loading and unloading items.