Gold in World of Warcraft is a currency that is awarded in small quantities for completing quests and missions, defeating enemies, and selling unwanted items to vendors. It is used in the game to purchase things like armor repairs, crafting reagents and the use of flight paths that ferry players to various locations. It is also the currency of exchange on WoW’s auction house.
Also get the Heirloom Mount. Being able to have basic riding speed from the beginning will save you a lot of time if you're starting from level 1. Allied races start at 20, so this is a non-issue for them. It's important to note that Pandaren can not use this mount until they finish their starting zone and pick a faction. Being Horde or Alliance is a requirement of the mount.
Selling gold for cash was, for a long time, against the game’s rules. But that didn’t stop large, sophisticated operations from springing up to take advantage of the opportunity to make real-world cash. The outfits that sold gold to players started out by paying foreign workers very low wages to endlessly grind the game, but they later started procuring their gold through quicker and more disruptive methods.
The most recent run I did on my hunter, I never set foot in Ghostlands, nor did I need to fully complete Dustwallow Marsh. There are a LOT of quest lines in each of these zones that might not be available unless you progress and complete story-line quests in order. Northern Barrens and Andorhal are especially bad in this regard, but many zones you can easily miss out on a lot of quests if you don't do a vital quest. So make sure you keep an eye on the minimap for quest ! indicators.
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I made one for my guildies but its for the Horde leveling process. One tip that goes for both factions is that you dont need to do all 3 zones to hit 120. I did like 1 and than three quarters of another. But once your 120 you need friendly with all 3 of your factions new reps to unlock world quests so make sure you hit at least friendly with all 3 while your leveling.