New update by Gmail Email overload? Try Priority Inbox - Official Gmail Blog.
It is normally seen that your mailbox is full of unwanted mails and you are not able to check all the mails then how to identify which mail is important & which are not? So Here is the solution now...
Gmail introduced new feature called Priority inbox.
Through this feature you can easily identify important mails which you should read.
It is basically based on the mails which you normally read & reply.
And If you want to use those mails then you can mark with star and choose option of less important or more important..
Just watch the video , you will understand everything.