a) Creation of Facebook App
How to create Facebook App ID (for Blogs and websites)?
b) Integrating Facebook comment plugin on the website or blog.
How to add Facebook Comments box on your Blogger blog site?
Integrating Facebook Page on your website and blogs can also help your visitors to like your page directly from the website or blogs, and go to your Facebook page:
How to add Facebook Page widget on Blogger blog or website?
c) Enable notifications of Facebook Comments on websites
For creation of Facebook App and integration of Facebook Comment on the website or blog, please refer to the above links. Not let's see how to manage the comments and set up notification for Facebook Comments.