Take Advantage of Facebook Insights
If you have a Facebook page and aren’t checking your stats then you’re missing out on a lot of useful information. Facebook Insights are the basic stats that Facebook automatically uses to track your page’s activity.
With Page Insights, you can understand the performance of your page, learn which content resonates with your audience and optimize how you publish to your audience so that people will tell their friends about you.
The trick to Facebook Insights isn’t in the numbers, but what you do with them.
With Facebook Insights you can immediately see when you need to make some adjustments to your strategy. Analyze your data to find out which of your posts were most successful and try to draw conclusions about why they were successful. Do you see trends in your successful posts? If so, try to incorporate those trends in your future posts.
The link below explains in great detail how Facebook Insights works.
http://www.fylrr.com/archives.php?doc=page-insights-guide.pdf
