Comscore Releases March 2010 U.S. Search Engine Rankings

RESTON, VA, April 12, 2010 – Comscore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world, today released its monthly Comscore qSearch analysis of the U.S. search marketplace. In March 2010, Americans conducted 15.4 billion core searches, with Google Sites accounting for 65.1 percent search market share.

March 2010 U.S. Core Search Rankings

Google Sites led the U.S. core search market in March with 65.1 percent of the searches conducted, followed by Yahoo! Sites (16.9 percent), and Microsoft Sites (11.7 percent). Ask Network captured 3.8 percent of the search market, followed by AOL LLC with 2.5 percent.

Comscore Core Search Report*
March 2010 vs. February 2010
Total U.S. – Home/Work/University Locations
Source: Comscore qSearch
Core Search Entity Share of Searches (%)
Feb-10 Mar-10 Point Change Mar-10 vs. Feb-10
Total Core Search 100.0% 100.0% N/A
Google Sites** 65.5% 65.1% -0.4
Yahoo! Sites 16.8% 16.9% 0.1
Microsoft Sites 11.5% 11.7% 0.2
Ask Network 3.7% 3.8% 0.1
AOL LLC Network 2.5% 2.5% 0.0

* Based on the five major search engines including partner searches and cross-channel searches. Searches for mapping, local directory, and user-generated video sites that are not on the core domain of the five search engines are not included in the core search numbers.
** Due to a change in the URL structure for certain Google News & Video searches, a portion of searches previously counted were excluded. Comscore estimates that these searches were responsible for a reduction in Google’s Core Search share of approximately 10 basis points or 0.1%.

Americans conducted 15.4 billion searches in March, up 7 percent from February. Google Sites accounted for 10.0 billion searches, followed by Yahoo! Sites (2.6 billion), Microsoft Sites (1.8 billion), Ask Network (593 million) and AOL LLC (380 million).

Comscore Core Search Report*
March 2010 vs. February 2010
Total U.S. – Home/Work/University Locations
Source: Comscore qSearch
Core Search Entity Search Queries (MM)
Feb-10 Mar-10 Percent Change Mar-10 vs. Feb-10
Total Core Search 14,472 15,427 7%
Google Sites 9,475 10,048 6%
Yahoo! Sites 2,433 2,605 7%
Microsoft Sites 1,667 1,802 8%
Ask Network 540 593 10%
AOL LLC 358 380 6%

* Based on the five major search engines including partner searches and cross-channel searches. Searches for mapping, local directory, and user-generated video sites that are not on the core domain of the five search engines are not included in the core search numbers.

March 2010 U.S. Expanded Search Rankings

In the March analysis of the top properties where search activity is observed, Google Sites led the search market with 14.3 billion search queries, followed by Yahoo! Sites with 2.7 billion queries and Microsoft Sites with 1.9 billion. Facebook.com experienced significant growth during the month with a 48-percent increase to 647 million searches, jumping one position in the ranking.

Comscore Expanded Search Query Report
March 2010 vs. February 2010
Total U.S. – Home/Work/University Locations
Source: Comscore qSearch
Expanded Search Entity Search Queries (MM)
Feb-10 Mar-10 Percent Change Mar-10 vs. Feb-10
Total Internet 22,271 23,866 7%
Google Sites 13,482 14,252 6%
Google 9,929 10,547 6%
YouTube/All Other 3,553 3,705 4%
Yahoo! Sites 2,509 2,689 7%
Yahoo! 2,496 2,676 7%
All Other 13 13 0%
Microsoft Sites 1,720 1,862 8%
Bing 1,498 1,604 7%
Microsoft/All Other 222 258 16%
Ask Network 689 742 8%
ASK.COM 300 332 11%
MyWebSearch.com/ All Other 389 410 5%
craigslist, inc. 629 664 6%
eBay 624 659 6%
Facebook.com 436 647 48%
AOL LLC 549 594 8%
AOL Search Network 299 319 7%
MapQuest/All Other 250 275 10%
Fox Interactive Media 391 406 4%
MySpace 388 402 4%
All Other 3 4 33%
Amazon Sites 210 226 8%

About Comscore
Comscore, Inc. (NASDAQ: SCOR) is a global leader in measuring the digital world and preferred source of digital marketing intelligence. For more information, please visit www.comscore.com/companyinfo.

Press
Bill Daddi
Daddi Brand Communications
646-370-1341
press@comscore.com