Website Builder lets you add Facebook® Social Plugins to content blocks in your Web pages for more visitor interaction. At the Facebook Developers website, you can customize your own Social Plugins, such as a Like button or an Activity Feed, which shows your Website Builder visitors what their Facebook friends are doing.
You can add Social Plugins by pasting the iframe or XFBML code from the Facebook Developers website into the HTML field of the content block where you want to display the Social Plugin.
Some options have only one code section to copy and paste.