Audience creation is critical to running a Facebook Advert.
If you desire to know more about Facebook Targeting, you can click this link
http://www.classicdigits.com/targeting
In this video, I explained how to use the audience insight tool to research your target audience.
When you have researched, you need to learn how to create your audience and I have another video that shows you how to do that. Click the link below to watch how to create your audience;
For a comprehensive training on how to use Facebook to make money, click the link below
http://www.classicdigits.com/fb