Facebook offers Social plugins which let you see what your friends have liked, commented on or shared on sites across the web. All social plugins are extensions of Facebook and are specifically designed so none of your data is shared with the sites on which they appear.
Please check this links just below :
Here i am sharing how these plugins you can Add on your Blog.
1.
Like button
The Like button lets users share pages from your site back to their Facebook profile with one click.
Click here to know how to embedd this like button.
2.
Activity feed
The Activity Feed plugin shows users what their friends are doing on your site through likes and comments.
In order to add this widget.Go to Design -->Add a Gadget --> Select Html/Java Script...and copy the Generated Code(which is generated on facebook) to it.
3.
Comments
The Comments plugin lets users comment on any piece of content on your site.
Click here to use this.
You can also Disable you default comments.
visit this link
4.
Like box
The Like Box enables users to like your Facebook Page and view its stream directly from your website.
Click Here to Add.
5.
Recommendations
The Recommendations plugin gives users personalized suggestions for pages on your site they might like.
In order to add this widget.Go to Design -->Add a Gadget --> Select Html/Java Script...and copy the Generated Code(which is generated on facebook) to it.
I also Suggest you to Optimise your blog title.By default when your post page is displayed, your blog title is always shown in this manner:
<blog title>: <post title>
If you want your Blogger blog post be easily indexed by search engines, on each post page, your blog title has to be in this order:
<post title>: <blog title>
Click Here to Add.