This morning in San Francisco at its F8 conference, Facebook showed off its forthcoming mobile ad network called Facebook Audience Network (FAN). Consequently, Facebook is squarely stepping up to challenge Apple, Google, and other tech titans already heavily invested in mobile advertising.

As widely rumored, the ad network will serve as a means for developers to make money without having to sell their own ads. In short, developers can integrate code to run FAN in banner ads. Within a few months, developers and advertisers will be able to take advantage of everything the Facebook ad network has to offer.

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