Today I will explain the using of cd key simply. You maybe find that usually use World of Warcraft cd key to activate the game if you play this game. The cd key is meaning that you need buy a serial number, and then use this serial number playing game. This is a way usually use in single real computer before.
Why we use the serial number? Because at present external hanging rampage., but world of warcraft level faster, if use external hanging and then apply for another again which is convenience. So in order to control external hanging, and server stable. 9 city also like aboard’ warcraft open up cd key serve. The aim is to improve threshold of world of warcraft, and make them not dare use external hanging,. Because if suspending, your World of Warcraft cd key which buy through money will expire and thus lose validity. If you do not use external hanging, your WoW cd key could use for long.
Through I explain, you should understand it. Now you can buy it and try in game.