Dive Summary:

• Twitter has filed for its initial public offering, taking the next step toward becoming a publicly traded company, the company announced via a tweet Wednesday.
• The announcement comes after the company acquired the mobile advertising firm MoPub, which could fuel purchases via the the mico-blogging platform.
• Internet Retailer reports that the top 50 retailers in its Social Media 300 group get an average of 0.31% of their web traffic from Twitter.

From the article:

The announcement comes a day after Twitter indicated it would move further into mobile advertising via its purchase of mobile-focused advertising firm MoPub. MoPub’s mobile ad exchange enables advertisers to bid in real time for ad space in mobile apps. ...