In World of Warcraft, each character can have two main occupations. There are acquisition professions (Skinning, mining, herbs) and production professions (blacksmith, leather processing, inscriptions, alchemy, engineering, tailoring, jewelry processing, and magic)
There is also a second job. These you can have in every character. They are cooking, fishing, archeology (level 20 and above) and first aid. (Side note: First aid was removed during the next expansion, bandages were sent to a tailor shop, and anti-venom was given to the alchemist)
If you have any other questions about World of Warcraft Gold, I can help. good luck!