PSN codes are those codes which help you purchase downloadable games in the PlayStation Store. It is used by the younger person who doesn’t have access to credit card and can’t purchase their PSN subscription. Every PSN Gift Card has its own unique code which can be availed easily. Each code has its unique identity and is represented either by the currency used in your country or by a certain value that is expressed in the number of dollars. In order to exchange the code, one must visit the PS Store.