Azeroth has existed since the first Warcraft

When World of Warcraft originally launched back in WOW Classic TBC Gold 2004, it brought in a massive number of players and rapidly grew to have millions of readers worldwide. Aside from the sheer scale of the match, a large force behind the success of this MMO was that the world in which it was set.

Azeroth has existed since the first Warcraft: Orcs and Humans launched in 1994 and the following Warcraft two games farther assembled on the narrative and lore. Warcraft 3 was probably the most popular of these early games and introduced us to a number of the characters that would go on to play huge roles in World of Warcraft, such as Sylvanas Windrunner, Jaina Proudmore, along with Arthas Menethil, among many others.

When World of Warcraft launched in 2004, each of the lore, background, and places that had been laid out from the earlier Warcraft games have been attracted to life in Blizzard's vast MMO.

If you've only got a couple of hours a week to buy TBC Classic Gold devote to an MMO, Classic may not be the game for you and you may be better off looking at modern Warcraft to fill this Azeroth-shaped hole. Having said that, if you are not particularly concerned with endgame content such as raiding or max-level dungeons and just want to explore Azeroth because it was in 2006 then by all means, continue. But if you would like to enjoy everything that Classic offers, then you need to be ready to devote a lot of time not just levelling your character however finishing different Attunement quests and grinding reputation to access some of those late-game instances.