comScore Media Metrix Ranks Top 50 U.S. Web Properties for April 2009

Swine Flu Concerns Cause Surge in Visitation to CDC.gov

Social Networking Category Has Record Month Led by Gains at Twitter and Facebook

RESTON, Va., May 14 -- comScore, Inc. (NASDAQ: SCOR) , a leader in measuring the digital world, today released its monthly analysis of U.S. consumer activity at the top online properties for April 2009 based on data from the comScore Media Metrix service. April saw Americans turn to the Web for the latest information related to the swine flu, causing traffic to soar at CDC.gov. The month also saw visitation to social networking sites reach record numbers, driven by growth at Twitter.com and Facebook.com, as well as an increase in visitation to real estate and home-related sites as the spring season prompted many Americans to consider home improvements. The tax category also experienced strong growth as procrastinating Americans tried to beat the April 15 deadline.

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"When news of the swine flu pandemic erupted, many Americans turned to the Internet as their primary source of information for how to keep themselves and their families safe," commented Jack Flanagan, executive vice president of comScore Media Metrix. "April also saw a record number of visitors at social networking sites with Facebook and Twitter each adding millions of new users as a result of continued media attention and overall interest in the sites."

Swine Flu Drives Americans Online in Search of Information

News of the swine flu outbreak prompted many concerned Americans to jump online in search of information about prevention, detection and treatment of the virus. The Centers for Disease Control and Prevention's site, CDC.gov, witnessed a 142-percent increase to 5.7 million visitors, making it the top-gaining property in April.

Social Networking Reports Record Visitation

The social networking category experienced a record month, growing 12 percent to nearly 140 million visitors, or nearly three-quarters of the U.S. online population. MySpace Sites led the category with 71 million visitors, followed by Facebook.com with 67.5 million visitors, an increase of 10 percent from the previous month. Twitter.com, now the third ranked social networking site, experienced another explosive month of visitor growth, jumping 83 percent to 17 million visitors.

Americans' Homes Top of Mind in April

Many Americans sought information related to their homes in April with the Real Estate category reporting a 10-percent increase to 48.4 million visitors and the Community - Home category gaining 10 percent to nearly 30 million visitors. Move Network led as the most visited real estate site attracting 13.2 million visitors (up 88 percent vs. March), followed by Yahoo! Real Estate with 6.8 million visitors (up 11 percent) and AOL Real Estate with 3.6 million visitors (up 15 percent).

The start of spring led many Americans to consider home repairs and remodeling, driving traffic to the Community - Home category. About.com Home & Garden led the category with nearly 4 million visitors (up 16 percent), followed by AOL Home with 3.8 million visitors (up 29 percent) and Better Homes & Gardens Network with 3.8 million visitors (up 13 percent).

Top 50 Properties

Google Sites continued to lead as the most visited property in April with more than 155 million visitors, followed by Yahoo! Sites with 149 million visitors and Microsoft Sites with 126.5 million visitors. Facebook.com climbed one spot in the ranking to #8 with 67.5 million visitors.

Top 50 Ad Focus Ranking

Platform-A led the April Ad Focus ranking, reaching 91 percent of the nearly 193 million Americans online. Yahoo! Network ranked second, reaching 87 percent, while Google Ad Network ranked third with an 85 percent reach. Specific Media moved up seven spots to #5 reaching 82 percent, while FOX Audience Network climbed three positions to #6 reaching 77 percent of Americans online.

  Table 1

  comScore Top 10 Gaining Properties by Percentage Change in
   Unique Visitors* (U.S.)
  April 2009 vs. March 2009
  Total U.S. - Home, Work and University Locations
  Source: comScore Media Metrix

                                             Total Unique Visitors (000)
                                                                   Rank by
                                                                    Unique
                                           Mar-09  Apr-09  %Change Visitors

  Total Internet : Total Audience          192,173 192,875     0     N/A
  CDC.gov                                    2,371   5,736   142     214
  CHINAONTV.COM                              2,674   6,300   136     185
  Move Network                               7,002  13,191    88      77
  Twitter.com                                9,313  17,001    83      56
  MLB.com                                    6,860  12,497    82      87
  Betawave Partners - Partial List           3,972   7,145    80     163
  Hollywood.Net - Hollywood Online Network   4,821   6,850    42     169
  teen.com Network                           5,495   7,806    42     145
  World Wrestling Entertainment (WWE)        3,774   5,086    35     236
  Wikia Sites                                3,638   4,892    34     239

  *Ranking based on the top 250 properties in April 2009.


  Table 2


  comScore Top 10 Gaining Site Categories* by Percentage Change in Unique
   Visitors (U.S.)
  April 2009 vs. March 2009
  Total U.S. - Home, Work and University Locations
  Source: comScore Media Metrix

                                          Total Unique Visitors (000)
                                          Mar-09    Apr-09   % Change

  Total Internet : Total Audience        192,173   192,875        0
  Community - Teens                       19,947    24,142       21
  Business/Finance - Taxes                18,311    20,585       12
  Social Networking                      124,406   139,781       12
  Real Estate                             43,924    48,357       10
  Entertainment - Music                   86,817    95,511       10
  Community - Home                        27,161    29,857       10
  Retail - Computer Software              34,346    37,685       10
  Retail - Flowers/Gifts/Greetings        28,356    31,019        9
  Online Gambling                         11,670    12,754        9
  Gaming Information                      40,637    44,370        9


  Table 3

  comScore Top 50 Properties (U.S.)
  April 2009
  Total U.S. - Home, Work and University Locations
  Unique Visitors (000)
  Source: comScore Media Metrix

                                          Unique
                                         Visitors
  Rank        Property                     (000)

      Total Internet : Total Audience     192,875
   1  Google Sites                        155,319
   2  Yahoo! Sites                        149,118
   3  Microsoft Sites                     126,452
   4  AOL LLC                             107,469
   5  Fox Interactive Media                87,830
   6  Ask Network                          73,491
   7  eBay                                 72,899
   8  FACEBOOK.COM                         67,481
   9  Wikimedia Foundation Sites           65,461
  10  Amazon Sites                         62,730
  11  Apple Inc.                           54,550
  12  Glam Media                           54,485
  13  CBS Interactive                      53,473
  14  Turner Network                       49,719
  15  Viacom Digital                       47,911
  16  New York Times Digital               47,316
  17  craigslist, inc.                     46,469
  18  Weather Channel, The                 40,160
  19  AT&T Interactive Network             33,670
  20  Adobe Sites                          33,081
  21  Comcast Corporation                  32,776
  22  Verizon Communications Corporation   32,648
  23  Wal-Mart                             32,515
  24  Superpages.com Network               29,225
  25  Answers.com Sites                    29,062
  26  Demand Media                         28,492
  27  The Mozilla Organization             27,958
  28  Disney Online                        27,180
  29  Target Corporation                   26,961
  30  Bank of America                      26,736
  31  WordPress                            26,567
  32  Time Warner - Excluding AOL          25,714
  33  Gorilla Nation                       25,142
  34  Photobucket.com LLC                  24,939
  35  Expedia Inc                          24,283
  36  AT&T, Inc.                           24,009
  37  United Online, Inc                   23,996
  38  Everyday Health                      23,668
  39  CareerBuilder LLC                    23,506
  40  iVillage.com: The Womens Network     22,596
  41  NBC Universal                        21,671
  42  WebMD Health                         21,605
  43  Gannett Sites                        21,558
  44  ESPN                                 21,384
  45  JPMorgan Chase Property              21,264
  46  Monster Worldwide                    20,299
  47  Weatherbug Property                  20,293
  48  NetShelter Technology Media          20,164
  49  Shopzilla.com Sites                  20,061
  50  Real.com Network                     19,904


  Table 4

  comScore Ad Focus Ranking (U.S.)
  April 2009
  Total U.S. - Home, Work and University Locations
  Unique Visitors (000)
  Source: comScore Media Metrix

                                                   Unique
                                                  Visitors
  Rank    Property                                  (000)    % Reach

      Total Internet : Total Audience              192,875    100.0
   1  Platform-A**                                 176,455       91%
   2  Yahoo! Network**                             167,129       87%
   3  Google Ad Network**                          164,518       85%
   4  ValueClick Networks**                        160,307       83%
   5  Specific Media**                             158,012       82%
   6  FOX Audience Network**                       149,249       77%
   7  Yahoo! Sites                                 149,118       77%
   8  Google                                       148,511       77%
   9  24/7 Real Media**                            147,668       77%
  10  Traffic Marketplace**                        143,519       74%
  11  Tremor Media - Potential Reach               141,971       74%
  12  Microsoft Media Network US**                 139,674       72%
  13  Tribal Fusion**                              138,274       72%
  14  Casale Media - MediaNet**                    137,884       71%
  15  interCLICK**                                 134,834       70%
  16  YuMe Video Network - Potential Reach         134,608       70%
  17  Turn, Inc**                                  134,028       69%
  18  Adconion Media Group**                       133,498       69%
  19  CPX Interactive**                            130,370       68%
  20  Collective Network by Collective Media**     129,808       67%
  21  ADSDAQ by ContextWeb**                       123,534       64%
  22  Platform-A Video Network - Potential
       Reach                                       121,949       63%
  23  AudienceScience (formerly Revenue
       Science)**                                  121,001       63%
  24  Burst Media**                                116,727       61%
  25  Digital Broadcasting Group (DBG) -
       Potential Reach                             112,646       58%
  26  MSN-Windows Live                             111,783       58%
  27  AOL Media Network                            107,469       56%
  28  BrightRoll Video Network - Potential
       Reach                                        99,911       52%
  29  Undertone Networks**                          97,053       50%
  30  AdBrite**                                     91,033       47%
  31  YOUTUBE.COM                                   89,697       47%
  32  Pulse 360**                                   82,574       43%
  33  Vibrant Media**                               80,779       42%
  34  Centro - Potential Reach                      75,551       39%
  35  NNN Total Newspapers: U.S.                    74,415       39%
  36  Ask Network                                   73,491       38%
  37  Adify**                                       73,467       38%
  38  Kontera**                                     72,870       38%
  39  Monster Career Ad Network (CAN)**             72,225       37%
  40  MYSPACE.COM*                                  70,954       37%
  41  FACEBOOK.COM                                  67,481       35%
  42  ITN Digital - Potential Reach                 66,578       35%
  43  TattoMedia**                                  63,379       33%
  44  MSN.COM Home Page                             57,753       30%
  45  IAC Ad Solutions                              57,650       30%
  46  EBAY.COM                                      56,319       29%
  47  Glam Media                                    54,485       28%
  48  AMAZON.COM                                    52,058       27%
  49  NNN Top 25                                    50,644       26%
  50  Business.com Network                          48,692       25%

  Reach % denotes the percentage of the total Internet population that
  viewed a particular entity at least once in April. For instance, Yahoo!
  Sites was seen by 77 percent of the nearly 193 million Internet users in
  April.

  *  Entity has assigned some portion of traffic to other syndicated
     entities.

  ** Denotes an advertising network.

  About comScore Media Metrix

comScore Media Metrix provides industry-leading Internet audience measurement services that report details of online media usage, visitor demographics and online buying power for the home, work and university audiences across local U.S. markets and across the globe. comScore Media Metrix reports are used by financial analysts, advertising agencies, publishers and marketers. comScore Media Metrix syndicated ratings are based on industry-sanctioned sampling methodologies.

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.

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