Facebook comments plugin will help you display Facebook Comments on your website. You can use Facebook Comments box on your pages/posts.
This plugin will insert a Facebook Comment Form, Open Graph Tags and ALSO insert all Facebook Comments into your WordPress Database for better SEO.
Add the Facebook Comments box to your website and sync it with your WordPress database; show comment counts and use latest comments widget.
This plugin will insert a Facebook Comment into your WordPress Database when user comments on your post / page.