Facebook launches mobile ad network to vie with Google, Twitter

Facebook Inc rolled out a new service that it envisions will distribute ads across a network of mobile applications, opening the door to a new source of revenue for the Internet social network. The service, which the world's No. 1 social network has been working on for some time, allows mobile-app makers to insert various types of ads within their software, with Facebook sharing advertising dollars with the developers. "This is really the first time that we're going to help you monetize in a serious way on mobile," Facebook Chief Executive Mark Zuckerberg said at the company's developer conference in San Francisco on Wednesday. Facebook also described new features that make it easier for users to limit how much personal information they share with third-party mobile apps, and that let users log into social apps without providing their identity.

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