Much like the Twitter Web Part, the Facebook web part enables you to display your Facebook presence. Using the Facebook social plugin API, the web part displays the name of the page or profile, a "Like Page" button, a count of the total number of likes for the page, and can display recent activity.
See updated instructions for the Facebook Web Part here!
With header image (default settings for web part):
Without header image (set to Hide Cover Art):
With header image and activity stream (set to Include Activity Stream):