Twitter unveils video ads

Twitter on Tuesday unveiled a new advertising program that delivers "promoted videos" to the tweet stream of users of the popular messaging platform.

Twitter tumbles as user growth disappoints (Update)

Twitter shares sank Tuesday to their lowest levels since the company's market debut after the popular messaging platform reported a jump in revenues but disappointing growth in users.

Authors Guild asks US court to rule against Google

The Authors Guild says that Google Inc. is stealing business from retailers and has asked a New York federal appeals court to find that the Internet giant is violating copyright laws with its massive book digitization project.

US Internet ad revenue surpasses broadcast

For the first time, U.S. Internet advertising revenue has surpassed that of broadcast television thanks to sharp growth in mobile and digital video ads.

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