Twitter to Sell Users' Old Tweets to Marketers

"Starting next month, DataSift will launch a cloud-based service that will allow other companies to analyze these two-plus years of tweets to learn more about their customers."

Report: Facebook, Google Overtake Yahoo In Display Ad Market Share

"Yahoo’s once dominant position with display advertising is now officially over. Research firm eMarketer released figures Wednesday showing that both Facebook and Google surpassed Yahoo last year in display-ad revenue, with $1.73 billion and $1.71 billion, respectively."

Google's iPhone Tracking

"The web giant and other ad companies bypassed privacy settings in Apple's Safari browser on mobile devices and computers – tracking the online habits of people who intended for that kind of monitoring to be blocked."

Study: Cyber Monday was Biggest Online Shopping Day Ever in U.S.

"Monday was the highest-grossing online shopping day in U.S. history, with spending reaching $1.25 billion, according to market research firm comScore. That's up 22% from the previous record, which was last year's Cyber Monday."

Report: Facebook Dominates Display Ads

"Facebook accounts for 15 percent of total spent online, beating Google and Yahoo sites, which are tied with 10 percent each. Facebook also is responsible for 28 percent of all display ads seen online in the U.S., up from 23 percent in the same quarter last year."

Internet Advertisers Begin Offering New Do Not Track Icon

"The IAB is calling on its members to display this innocuous icon on Web pages that are actually embedded with tracking cookies, Web beacons and other stealthy tools that help advertising networks track precisely where you go and with whom you associate on the Internet."

Twitter Gears Up Auto-Ads for Big Clients: Sources

"Twitter is courting big time advertisers and will soon allow them to tailor, automate and publish ads in bulk directly onto the Internet microblogging service, according to two people with knowledge of the matter."

Top 10 YouTube Videos Posted by Colleges, and What They Mean

"More than 400 colleges and universities have set up channels on YouTube as part of the YouTube EDU section of the popular video site, but university officials admit they are still experimenting with the service and learning what types of videos resonate with off-campus audiences."

Discounted Kindle Points to Future of Ad-Supported Electronics

"Amazon's recent ad-supported Kindle isn't just the future of e-readers. It may also be a look at the future of how people buy electronic gadgets: with a reduced price, subsidized by advertising."

Mobile Ads to be $4B Industry by 2015

"The mobile advertising industry is projected to reach $4 billion in revenues in 2015 according to a report from research firm BIA/Kelsey."

Entertainment, Media Spending Hits $433B in 2010

"Advances in digital entertainment and advertising helped push U.S. entertainment and media spending in 2010 to $433 billion, up 3% from 2009, says a PricewaterhouseCoopers report out today. That's the first increase in three years."

Google's Stealth Multi-Billion-Dollar Business

"Google became a $30 billion company on the back of search advertising -- but the company thinks its other multi-billion-dollar advertising business will be its growth engine of the future. That other business is "display" advertising, which includes banner ads, video ads and in-app mobile ads."

Study: Facebook “Likes” More Profitable Than Tweets

Eventbrite "announced Wednesday that an average tweet about an event drove 80 cents in ticket sales during the past six months, whereas an average Facebook Like drove $1.34."