As a Hunter, your primary role will be to provide ranged damage-per-second and crowd control with your traps. Actually, I lied, your primary role will be spent convincing everyone you group with you're not one of those brainless morons that seem to end up playing Hunters.
You see, Hunters, hands down, are the easiest class to level in the game. At level 10 you get your first pet. This pet will tank for you while you stand back and hail arrows at your target. This means that your overall deaths and repair bills will be lower than other classes, while at the same time your kills will be faster since your pet adds to your damage output.
Combat with your Hunter is fairly straightforward: send in your pet, wait a few seconds for it to build sufficient aggro and then start plinking away. It's worth installing an add-on like Omen so you can tell when you're in danger of out-aggroing your pet. You will need to do some damage yourself to get xp or be able to loot the corpse, so even if you're just out farming easy mobs, make sure you hit it once or twice with your bow.
Read the rest (http://www.wowinsider.com/2008/05/30/new-players-guide-your-life-as-a-hunter/)