Trauma pads, called trauma plates or ballistic panels, are protective gear that provides additional protection to a person wearing a bulletproof vest. Considered as an add-on item, it is an insert that lessens the ballistic force of any projectile. It lowers the risk for ballistic and blunt force trauma, hence the name trauma pads. These inserts are mostly placed in the front, back, and side pockets of a bulletproof vest or plate carrier.
It may not provide ballistic protection and can only mitigate impacts as is; however, it is always a good idea to invest in additional safety whenever possible because you never know what level of threat you will face in the future.