Facebook has a mobile problem. Many of its users have transitioned from logging in through their browsers to logging in on phones and tablets [3], but advertising revenue has not followed at the same pace [4].

The company's first mobile-only ad product, Sponsored Stories [5], launched just earlier this summer. Today, it announced its second: mobile ads for apps [6].

Facebook users who click these new ads will be taken to the Google Play or the App Store to buy the apps they advertise. Developers can purchase them using a simple dashboard that asks for little more than audience and budget, similar to the interface used for advertising on the web platform.

The holy grail of app-store marketing is being featured in an app store. But if an app store won't have you, buying a presence on Facebook's app makes a pretty logical second choice. The platform has 543 million mobile users as of June. And according to Facebook developer Vijaye Raji--who announced the new ads on the Facebook Developer Blog [6]--links on Facebook have sent users to Google Play and the Apple App Store 146 million times in the last 30 days alone.