Golden Keys can be spent on the mysterious loot chest in Sanctuary.
If you link your SHIFT account to any given platform (PSN, Steam Xbox 360) from within Borderlands 2 -- not the site itself -- you'll receive a bonus Golden Key!
If you have registered for SHiFT and didn’t receive a Golden Key, submit a ticket send us your e-mail address and your Steam ID, Gamertag, or PSN ID and we’ll take care of it.