There are a plethora of plugins that add the different elements of Facebook to your WordPress. You can add a likes counter, a facebook content locker, a facebook discount for likes option and many more on your WordPress site.
Let’s have a look at a few plugins that should aid you in the process of integrating Facebook into your WordPress website.
Ultimate Facebook
Facebook Traffic Pop
Easy Facebook Fanpage And Promotion Builder
Facebook Pages
Facebook Viral Content Locker