Google is starting a public test of a new Gmail feature called Smart Labels
When it’s on, Smart Labels creates three labels called Bulk, Forums and Notifications.
Once you turn it on from the Labs tab in Settings, Smart Labels automatically categorizes incoming Bulk, Notification and Forum messages, and labels them as such. “Bulk” mail includes any kind of mass mailing (such as newsletters and promotional email) and gets filtered out of your inbox by default (where you can easily read it later), “Notifications” are messages sent to you directly (like account statements and receipts), and email from group mailing lists gets labeled as “Forums.”
More info: http://gmailblog.blogspot.com/2011/03/new-in-gmail-labs-smart-labels.html
