Facebook Pages Manager app allows you to update your organization page on your device. You can also do most of these same updates on Facebook by clicking on your page. If you have more than one page on Facebook, you can access all of them in this app. You have more settings options though in the computer version of Facebook. The Pages app shows Messages, Photos, and Insights from your page. This app appears to be just be created for Facebook administration function rather than being a very functional app. If you are an administrator on a Facebook page, you will receive this app.