Frustrated much? You have 4,824 Fans for your Facebook Page, but only 15-20 of them ever see your posts. Why does this happen?
It's the Facebook News Algorithm
Facebook looks at every single thing posted as an object. Status updates, photos, video links, events - every post type is just an object to Facebook. And Facebook analyzes each object to see how much interaction it gets (likes, comments, shares). If the objects you share on your Facebook page get lots of likes, comments, and shares, then your overall ranking will be higher. If your rank is high, Facebook will show your posts to more people. Here is the information you need to get better visibility.