The Primary tab is dedicated to messages from other people (aka humans) and given top priority. Every other incoming email is sent to a secondary tab. Messages from social networks go to the next tab. Marketing messages (aka company revenue generators) go to the Promotions tab. The Updates tab houses invoices, order status, and other trigger emails. And the final tab, Forums, is for newsletters and discussion sites. Mobile and tablet versions are rolling out within weeks of the desktop tabs launch. This makes it harder for companies to share their marketing messages on every device. There may be a silver lining for marketing in the user’s ability to customize the inbox. Good news for companies that have great relationships with their customers. Their emails could end up on the Primary tab. Get the full story at Social Media Today and The Official Gmail Blog