Google plus is a very fast growing social network site owned by Google. You can see the google plus notification in any Google product sites with menu bar. Now if you installed this chrome extension you can view Google plus notification any where on the web.Whenever you have a new notification (for example, when someone adds you to a circle or shares a post with you), the extension button will turn red and show you how many updates are waiting for you. Once you click the button, a window will show you all of your most recent notifications. You can replying to a comment or adding someone back to your circles by this extension. That way you can stay up-to-speed with your circles on Google+ no matter where you are on the web.
Install chrome extension - Google plus notification