Gmail recently released a feature that helps you keep your inbox organized. You can now enable tabs in your inbox that will classify your messages into categories such as Primary, Social, Promotions, Updates, and Forums.
To enable these tabs, click on the gear icon near the top right corner of your Gmail window and select “configure inbox”. The will allow you to enable some or all of the new tabs.
Once these tabs are enabled, any new emails will automatically be categorized. If an email ends up in the wrong tab, just drag it to the correct one!