Facebook Platform application ID that administers your site pages. You can get this ID by visiting the page at <a href="https://developers.facebook.com/apps/">https://developers.facebook.com/apps/</a><br /><br />You should specify this field:<ul><li>to make your site statistics appear in the Facebook Insights dashboard</li><li>to enable a moderator interface on Facebook where comments from all product pages can be easily moderated together</li></ul>