Just to make it clear, we aren't talking about your ancestors cheap wooden shields. Shields nowadays consist of the highest quality technology you can buy... or steal. Shields can be as simple as metal plates to deflect bullets or as complicated as electrocuting those who dare to attack you with a metal melee weapon.
A basic shield left over from the early humans that was used for crowd control. Its uses are limited, but it is useful nonetheless. This shield will protect you from many melee attacks and weaker firearms. It is definitely not enough for those who want to tank their way through everything, but for those that are light on their feet this shield will be a lifesaver.