How can you find out who's been on your facebook page?

What are the best practices to find the right article to share on a Facebook Page among all the articles published on my website?

• I manage the Facebook Page of a big web-editor which publishes 20-30 articles a-day, which cover all themes (lifestyle, politics, technology, web, gossip). So every day I have to understand and choose which of theese articles share on the Facebook Page. Right now I'm doing this selection using experience and my community's knownledge, but I wanna ask you if you can suggest other criteria which could be useful to determine which articles have to be shared on the Facebook Page.  Thanks

• Answer:

  First, I'd look to those topics which have exhibited the greatest engagement on the page for a clue as to articles that would be of interest. Secondly, I'd consider polling your page "Likers" around the type of information they would find of value. Third, on some (or perhaps all) of of your posts, you might ask users to "like" if they'd like to see more information on the particular subject.