Problems…Nevermind I figured it out

I just installed and activated this plug in and now I do not know how to use it. All I see is code! I go into my installed plug ins and find this facebook one, click edit and it just brings me to a page with a lot of code. Please help me, Im obviously not seeing something real easy here.

https://www.ads-software.com/plugins/facebook-like-box-widget/