When's the last time you replied, promptly, to a message sent through Facebook? Aren't sure? Well Facebook, craving more real-time usage of its service, hopes to change that.

What's the etiquette for using Google Glass in public? The answers aren't always obvious, so Google has provided some tips.

Twitter faces growing pressure to attract new users and dramatically increase engagement on the platform. Can it ever rival the numbers and growth of Facebook?

Japan's Rakuten will acquire instant messaging and calling app developer Viber Media for US$900 million, the e-commerce giant said Friday, highlighting its moves to penetrate new markets.

Facebook, in a move that acknowledges real social issues around gender identity, has updated its site to give people more ways to express their gender.

A coalition of consumer and privacy groups will ask a U.S. court to reject a settlement that allows Facebook to use minors' pictures in advertisements on the site without their parents' consent.

If you think Yahoo has given up on search, think again. The company may have handed its back-end search operations to Microsoft, but Marissa Mayer thinks there's work to be done on mobile devices, particularly around contextual search.

Apparently Klout is popular.

LinkedIn is shutting down Intro, its recently launched mobile service for connecting people over email, that raised security concerns.

Twitter Wednesday reported that fourth quarter sales more than doubled over the past year, but the company nevertheless spooked investors by acknowledging a slowdown in new user growth and in user engagement.

Twitter will give researchers access to its public and historical data to help them get insights on a wide variety of issues.

Twitter has reported its first earnings as a public company, revealing that sales more than doubled from a year ago, though it still hasn't managed to turn a profit.

While Princeton University researchers predict Facebook could shed 80% of its users over the next few years, a Carnegie Mellon University computer scientist has the social network's back and says Facebook's prospects are good.

The WPP advertising group is improving its social media management with Datasift to support agencies such as Ogilvy and Mather, Young and Rubicam and JWT.

Facebook will celebrate its 10th birthday on Tuesday, an occasion likely to spur an outpouring of reflection on its past and speculation about its future.

Volkswagen of America is looking to capitalize on an expected broad use of social media by viewers of Sunday's Super Bowl.

Facebook has introduced Paper, a mobile app that mixes content from a user's own feed with articles from "well-known publications" and displays it all with a new interface.

Imagine using a separate Facebook app just for sharing status updates with your closest friends, or maybe co-workers. In the next few years, such an app could exist.

More than half of Facebook's ad sales came from mobile devices in the fourth quarter, showing continued strength in the site's ability to monetize its service on smaller screens.

Yahoo reported a 6 percent drop in revenue for the fourth quarter as sales of its display and search ads dropped compared to last year.

Customer experience has emerged as one of the enterprise software industry's hotter segments of late, as companies try to run marketing, sales and support across both traditional and digital channels.