A tailgate is a door at the back of a truck or car, that can be opened downwards for conveniently for loading and unloading the cargo. This tail gate is securely fixed to the body of the truck with the help of hinges.
Any damage to the tailgate or damage to the mechanism holding the tailgate in place could mean the contents inside the truck are unsafe too.
Keep the tailgate in perfect working condition by replacing the damaged parts immediately to ensure the safety of the contents inside and also the safety of the fellow drivers sharing the road with you.