We are going to see how to use the Facebook page to integrate your Facebook fan page into your app with the design of your app.
note : you have to fill the Facebook API in Dashboard > settings >APIs
First you have to add a Facebook page in your app by clicking from “Add pages” to add it in the carousel of your pages.
Then just enter the ID of your Facebook Fan Page in the appropriate field, for example for our Facebook Page: https://www.facebook.com/webxperience, it will be “webxperience”:
Then press “ok” to import your Facebook Fan Page.
Here is the result
Video walk through
You can watch this informative video that will help you in understanding more about this feature HERE