Leaving comments on your site
If you want your users to be able to leave comments on your site, we’ve added a Facebook comments Bloc. The Facebook comments Bloc lets people comment on content on your site using their Facebook account. People can choose to share their comment activity with their friends (and friends of their friends) on Facebook as well.
Add this Bloc through the Side Menu by clicking “Add Blocs to Page” > “Apps” > “Facebook Comments”.