"Facebook Share is a way for users of Facebook to share articles, pages, video, or flash content of a site with other Facebook users. Over two billion pieces of content are shared each week through Facebook. With two clicks, visitors to a website can share any page of that website through Facebook by generating a link to the page, along with a thumbnail image and a brief description (i.e., 'shared content') that will appear on the users' profiles and, depending on privacy settings, in the home page stream of all of the users' friends. Each time a link is shared by one user, potentially hundreds of new people may see and/or click through on the link."