It's not enough to get your Facebook fan page “liked” anymore. There's a lot more to it than that. In fact., that's much of what's behind the work I do with my clients. And one of the reasons I'm a partner with platforms like Likeable Local.
Want to see how Facebook figures out what content will be shared with their users? Check out this (overly simplified) breakdown of how it all works:

Source: Likes Aren’t Enough. Now Facebook Pages Need You To Add Them To “See First” | TechCrunch