Blizzard's World of Warcraft (WoW) has seen many advancements and expansions since its initial release in 2004. The game at one point had nearly 13 million players, but for the past few years has been losing subscribers for a multitude of reasons. In order to make things a bit more interesting, Blizzard has now altered the way tokens can be used, allowing them to applied to other Blizzard properties like Hearthstone and Overwatch.
If you are unfamiliar with tokens, they were introduced a few years ago to allow players to purchase gold in a legitimate manner. This also allowed those with an abundance of in-game gold to purchase the tokens and claim them for WoW game time.
The token has now been upgraded to allow players to trade it for Battle.net balance. What this essentially means is that you can now use a token towards Blizzard's other titles. When you transfer it to your Battle.net account, you will receive $15 credit which you can then use how you see fit such as purchasing digital downloads of other Blizzard titles, or in-game content such as Hearthstone cards or Overwatch loot boxes as specific examples.