Today I have seen Google priority box feature in Gmail. Nice feature to make difference in important and not important mails . If you are in hurry you can just check the important mails.
By automatically separating out your most important messages, Priority Inbox makes it easy for you to read and respond to the messages that matte
Gmail’s servers look at several types of information to identify the email that’s important to you, including who you email and chat with most, how often you email with these people, and which keywords appear frequently in the emails you read
If Priority Inbox makes a mistake, you can use the Mark important Mark not important buttons to correctly mark a conversation as important or not important, and Priority Inbox will quickly learn what you care about most.