Technical Service Bulletins (TSBs) are issued by manufacturers to identify issues/problems found in automobiles. TSBs are important for all vehicles, as they can provide critical information to car owners about their vehicles. Many times, TSBs identify issues pertaining to new vehicles that are covered under warranty.
For newer vehicles, TSBs are more important than a repair manual. Even the most skilled do-it-yourselfer would prefer to leverage a new vehicle's warranty and have the dealership address a problem.