Google has been trying to ameliorate Google+ by adding a lot of new features like Creative Kits and private message. And now the latest feature that Google has launched is the official notification extension for Google Chrome. This extension will let you view all the account notifications without even opening Google+!
After this extension has been installed you can view your account notifications in Google Chrome. All you have to do is to click on the notification button on the toolbar and then it will display the count of unread notification available. Although this feature is available on all Google apps using the new Google toolbar, but it will prove to be helpful only for people using Google Chrome.
You will be able to view notifications like updates on who added you on Google+ and who added a comment or +1 to one of your posts or a post you commented on. When you click the notification you will be displayed with the post just like the way it is displayed in Google+ and then when you click on any link the post would be opened in Google+.