According to Millennial Media’s recent “Mobile Mix” report for March, connected devices like the iPad account for a major portion of mobile impressions.

Businesses are maturing in the realm of social media, according to Social Media Examiner. Last year, the top question about social media concerned tactics – this year, it concerns return on investment.

U.S. consumers spent less time with all forms of media in 2009, save one: mobile.

According to Nielsen, online video ads perform better than TV ads on all four major metrics, but that doesn’t mean that advertisers should ditch the traditional small-screen format altogether.

Pay-per-call services powered by RingRevenue allow advertisers and publishers to capitalize on explosive mobile market growth.

After several years of flat growth from 2006 through 2008, coupon redemption in the U.S. grew by 27% last year, according to new research from The Nielsen Company

Office Depot is giving members of its Worklife Rewards loyalty program 100% back on purchases of everyday green supplies such as recycled hanging folders or storage boxes

Yes, unemployment is still hovering around 10 percent in the U.S., but that doesn’t change the fact that things have been quite sunny for freelancers, according to Elance.

According to comScore’s latest figures, Google’s competitors gobbled up its lost market share in March, as Bing continued its upward climb. Meanwhile, Facebook sustained its rapid growth as a search entity in the U.S.

Headlines from the week