Shift codes unlock golden keys which you can use to open an in-game chest that contains random loot that is leveled to your character. There may also be shift codes for exclusive skins among other things. These codes are shared on Borderlands' social media pages and you redeem them in-game or through the borderlands website. You need to link your PlayStation/Xbox/Epic account to a shift account in order for all of this to work.Can anyone explain the whole Shift codes thing? For example, how / where you get them, where to redeem them and what they generally unlock?