(Source: PRNewswire)

RESTON, Va., Sept. 1 /PRNewswire-FirstCall/ -- comScore, Inc. (Nasdaq: SCOR), a leader in measuring the digital world today released a study of U.S. online display advertising on social networking sites in July 2009, based on data from the comScore Ad Metrix service. The study showed that social networking sites accounted for more than 20 percent of all display ads viewed online, with MySpace and Facebook combining to deliver more than 80 percent of ads among sites in the social networking category.
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Top Online Display Ad Publishers in Social Networking Category
July 2009
Total U.S. - Home/Work/University Locations
Source: comScore Ad Metrix
Total Display__ Share of__ Ad Exposed
Ad Impressions__ Display__ Unique
(MM)__ Ads__ Visitors
(000)
-------------- -------- ----------
Total Internet : Total Audience__ 326,899__ 100.0__ 188,589
-------------------------------__ -------__ -----__ -------
Social Networking__ 68,927__ 21.1__ 129,620
-----------------__ ------__ ----__ -------
MySpace Sites__ 30,004__ 9.2__ 64,472
-------------__ ------__ ---__ ------
Facebook.com__ 26,813__ 8.2__ 67,389
------------__ ------__ ---__ ------
Tagged.com__ 1,940__ 0.6__ 7,422
----------__ -----__ ---__ -----
MocoSpace.com__ 496__ 0.2__ 1,067
-------------__ ---__ ---__ -----
Hi5.com__ 461__ 0.1__ 3,459
-------__ ---__ ---__ -----
Bebo__ 435__ 0.1__ 6,350
----__ ---__ ---__ -----
Classmates.com Sites__ 400__ 0.1__ 9,181
--------------------__ ---__ ---__ -----
BlackPlanet.com__ 345__ 0.1__ 2,084
---------------__ ---__ ---__ -----
GaiaOnline.com__ 258__ 0.1__ 1,859
--------------__ ---__ ---__ -----
DeviantArt.com__ 204__ 0.1__ 3,681
--------------__ ---__ ---__ -----
"Over the past few years, social networking has become one of the most popular online activities, accounting for a significant portion of the time Internet users spend online and the pages they consume," said Jeff Hackett, comScore senior vice president. "Social networking sites now account for one out of every five ads people view online. Because the top social media sites can deliver high reach and frequency against target segments at a low cost, it appears that some advertisers are eager to use social networking sites as a new advertising delivery vehicle."
AT&T Top Display Advertiser on Social Networking Sites in July
AT&T ranked as the top display advertiser on social networking sites in July with more than 2 billion ad impressions, which accounted for 30 percent of the company's total number of display ads delivered during the month.