A Facebook Fan page can represent a business, author, musician,
organization, or other specialty group. The goal is to interact with
your fans, attract more fans, supply information about your group or
business, offer a call to action, and of course—to keep the fans you
have.
At times, you may post an update, note, or other event and find you
lose fans. If you notice a handful of ‘un-like’ stats and have hundreds
or thousands of fans, it could just be that momentary attention those
who un-liked your page took to read your post and decide it wasn’t worth
having appear in their news stream. If you lose fans in tens or even a
hundred, then it’s important to take stop all postings until you
understand why they left.