You can redeem the key by visiting the designated location or following the instructions provided.
You can redeem the key by visiting the designated location or following the instructions provided.
Battle net EDIT: It shows "platform" and features the Battle net logo. It appears to be Blizzard's store used for various games such as Hearthstone, WoW, and Diablo.
Code redemption for any Blizzard game is handled via battle.net. Log in if you have an account; if not, set one up. Once logged in, look for a 'redeem code' option within your account settings.
The Blizzard Battle.net emblem appears in the upper-right section of the site, indicating all their current titles are hosted on this platform.