Question   How do I add Facebook comments to the bottom of a page?

<br><div id="fb-root"></div>
<script>(function(d, s, id) {<br>
var js, fjs = d.getElementsByTagName(s)[0];<br>
if (d.getElementById(id)) return;<br>
js = d.createElement(s); js.id = id;<br>
js.src = "//connect.facebook.net/en_US/all.js#xfbml=1";<br>
fjs.parentNode.insertBefore(js, fjs);<br>
}(document, 'script', 'facebook-jssdk'));</script>
<div class="fb-comments" data-href="http://example.com" data-num-posts="5" data-width="800"></div><br><br><br>

Replace "http://example.com" with your website domain

You can control the displayed number of posts by changing "data-num-posts" value

Also you can control plugin width by changing "data-width" value.