Linking your blog to Google+

Click on the Google+ tab to get started with google+and blogger.

Click on Get started

If you are not yet on Google+ you follow the steps shown below.

If you are already on google+, your profile will be shown, you wont need to upgrade your profile.
After you configure your google+ settings.

Check the boxes in order to automatically share after posting,prompt to share after posting and use google+ comments on the blog.

To unlink your blog from google+ click on the Disable Google+ link.