Super PACs spent $5.86 million on web ads to support or oppose 2012 presidential candidates.
A handful of major brands saw big growth in fans, while most others languished, according to BrightEdge .
Agency examined hundreds of apps in the Apple App Store and Android Marketplace.
Pew Research Center also identifies other missed revenue opportunities for news sites.
Growth of newcomers Pinterest and Google+ show social category is still in flux.
How did NBC's online audience stack up against other streamed events?
Even as Android gains share, CTRs fall. Meanwhile iOS has seen steadily rising response rates.
The number of digital coupon "events" increased by 12.3 percent in 2011.
New study examines the mobile research habits of bricks-and-mortar shoppers.
Researchers scanned every QR Code, Microsoft Tag, BEE Tag, JagTag, and the like in the top 100 magazines last year.
Amazon, Federated Media also see big gains in audience by year's end, comScore Media Metrix reports.
Sharp rise followed a slowdown over the fall, according to a new Pew report.
Ron Paul is the only GOP candidate whose fans collectively don't count The Bible in their top non-political Facebook page likes.
Digital marketing dollars to grow 23.3 percent, eMarketer says, while print spending falls.
On e-commerce sites, purchases on a tablet averaged $123, an Adobe study found.

February 22, 2012
1:00pm EST / 10:00am PST