Istagram’s ad business is growing up fast thanks to a boost of new technology from Facebook. The photo-sharing app with more than 300 million users and counting is opening up to potentially millions of advertisers, with more ad styles and sophisticated targeting tools first honed by its parent company. Instagram is launching ads with “Shop Now” buttons and other messages that link outside the app so users can take marketable action. Also, there’s a new API—software platform—that lets marketing partners automate the advertising process. Read full article here.