Displaying a Google+ Badge on your blog makes it easy for your readers to follow you on Google+.
If you change the association of your blog from a Google+ profile to a page through the Google+ tab on your blog, the gadget will automatically update itself.
To add the Google+ Badge to your blog, first make sure that you’ve upgraded your Blogger profile to a Google+ profile.
Once you’ve upgraded your blog to Google+ and decided whether to associate it with a Google+ profile or page, you can add the badge to your blog as a gadget. To add a gadget:
- Click Layout.
- Click on any of the Add a gadget links on the Layout page. You can later drag and drop the elements wherever you like.
- Click + on the Google+ Badge gadget to add it to your blog.