Gmail Priority Inbox

I was seeing a small link in red called "New Priority Inbox _beta" from yesterday. Today I clicked it... it said, Failed to activate Priority Inbox.

After couple of tries it got activated. So, What is it ??

This new feature if it works really as advertised will be really an awesome feature for most of us. Simply to put up, it just prioritizes the mails for us. But how ? Just it does it by watching our read/sent mails and also it gives us an option to mark a mail as Important/ Unimportant.

And also there is a new mailbox view which categorize the mails as : 

1. Important and Unread  or
   
2. Starred  or
   
3. Everything Else
   

I have subscribed to lot of newsletters starting from Techrepublic to DotNetSlackers and etc. And now Im not reading all of them or at-least not all the issues. So the quantity of the mail, then mails from Dell, HP, etc are just filling my mailbox. I dont want to unsubscribe those and also I dont want to label and archive them. I want it in my inbox. And also, sometimes, there is a possibility of missing a mail from some person due to the number of these kind of mails. So, the better way is prioritizing it. Thats what its all about !!

New Priority Inbox didnt read my old mails and its not showing any proper Important and Unread messages. May be it need sometime to loop through mails etc.. Hope it works as expected.