The new design, which Google says is being rolled out to users over the next few weeks, automatically sorts emails into a handful of separate tabs along the top of the inbox:
Primary where you should find messages from friends and family
Social for emails from social networks, media-sharing sites and online dating services
Promotions for regular mail-outs from retailers, daily-deal sites and other businesses
Updates storage for notifications and confirmations involving receipts, bills, and financial statements
Forums for emails from online groups, discussion boards, and mailing lists
Users can decide to remove one or more of the tabs and can control where emails from certain senders get routed.
The new interface, which is optional and can be turned off entirely, will also be available on the mobile Gmail apps for Android devices, the iPhone and iPad.