We all trust that the products we buy will work as advertised. No one would buy a certain product if they knew that it would break or somehow fail, but the reality is that they often do fail, sometimes with devastating effects.
Companies that sell products to the public have a responsibility to ensure they are safe for general use, but in a society where companies are trying their hardest to trim the bottom line in order to stay competitive, sometimes serious safety violations get passed over, and the consumers get their hands on truly dangerous items.
This can lead to things like bicycle brake cables snapping under use, target-shooting gun barrels exploding, tire treads slipping off while on the freeway, office chairs suddenly collapsing, laptop/phone or power tool batteries suddenly igniting, etc. Serious and permanent injuries and deaths may occur due to defective products, so it is extremely important to hold a company responsible for the damage its defective products cause.