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Mobile Minutes: Facebook relaunches Atlas; Google?s streaming music plans; Politics and social media; Walmart board

Facebook already uses your personal information to show you contextual ads on your News Feed, but now they are able to utilize the same data on behalf of third-party apps and Web sites.

Google Inc. is planning new and revamped streaming-music services in coming weeks, searching for a way to stand out in an increasingly crowded field of rivals from Apple Inc and Amazon.com Inc to Spotify. Nailing music is one way for Google to raise chances of continued success as people spend more time on mobile devices.

Want to find all the big political discussions that are taking place on the Internet? For the most part, they don't exist, according to data released earlier this month by Quantcast - a service that tracks the demographics of Internet users.

Walmart Stores Inc., looking to bolster its technology know-how, named Instagram Inc. co-founder Kevin Systrom to its board. Systrom, 30, will serve on the technology and e-commerce committee as well as the compensation, nominating and governance panel, Bentonville, Arkansas-based Wal-Mart said today in a statement.