How to Compete in Facebook Ads
This is an excellent article from Brett McHale over at WordStream. If you really haven't been exposed to how the Facebook auction works this is a must-read. Matt covers key topics in-depth with an objective, third-party perspective that clearly comes from real-world experience.
Blueprint from Facebook is a wonderful online curriculum for all things related to Facebook advertising. It's an an invaluable resource for beginners and advanced advertisers. If you are very new to Facebook advertising we highly recommend you spend some time here.