Over the next week, millions of Gmail users will notice that something’s changed. Just like the web browser containing it, Gmail will have tabs.

But it won’t be tabs for handling different accounts. Instead, the tabs will represent the new auto-sorting powers Google’s Gmail has been granted in an attempt to make your email more useful. You might say it’s an evolution of the spam blocker.

Leveraging years of data collection from Gmail accounts, Google (GOOG, Fortune 500) will be able to take notifications from services like Facebook (FB) and Twitter and file them away in a folder titled Social. Groupon (GRPN) deals and the never-ending onslaught of email from Fab will be tucked away in the Promotions folders……..(read the whole story)