In the World of Warcraft, there are two types of professions, primary and secondary. Every player may have as many Secondary Professions as he or she desires but will only be able to choose two Primary Professions. All professions also fall into three categories: gathering, production, and service.
Gathering Professions
Gathering professions support production professions by providing the materials necessary to create goods. Players may choose to become pure gatherers and sell gathered materials to other players.
Production Professions
Production professions allow players to create trade goods to be sold or used by the creator. However, some goods cannot be sold and are designed only to be used by the one who made the item.
Service Professions