Google has recently enabled Google+ integration into their popular blog-publishing service, Blogger.
This means that all comments made about your blog posts on Google+ will show up in your blog’s comment threads, allowing you to see activity from your visitors.
This is great for when you want to see who’s talking about your blogpost, and allows you to reach more people with more effectiveness.
Your readers can also choose whether to comment on your post publicly, or just to their own Google+ circles. They can also view comments the same way – either public ones or just those from people their circles.
You can enable Google+ comments from your Blogger Dashboard.
Source | Via