Facebook is the most viral social networking site, so it might be the reason why one should always think about making use of all the features that it provides to the publishers and developers. However, I would not push anyone to start using Facebook Comment Box without knowing its advantage. Every site has their own priorities and concerns but for the sake of an ongoing argument, let us first take a look at the following pros of adding Facebook Comment Box in Blogger.
The following instruction for adding Facebook Comment Box in blogger :-
1-Log in Blogger dashboard.
2-Make backup to your template.
3-Go to template = > edit html.
4-Search </body> tag by hit Ctrl+f key.
5-Copy the code (1) paste code above </body> tag.
6-Search <b:includable id='comment-form' var='post'>
7-Copy the code (2) paste code below <b:includable id='comment-form' var='post'>.
8-Click Save Template.