comScore Launches AdEffx(TM) Campaign Essentials in Europe

New Online Interface Enables Daily Audience Measurement for Digital Campaigns; Includes Traditional Post-Buy Metrics Such as Reach/Frequency and GRPs

LONDON, April 5, 2011 - comScore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world,
today announced the European launch of comScore AdEffx(TM) Campaign
Essentials, a powerful new audience measurement tool. The new online
dashboard features several highly sought after features for digital media
planning and optimisation, including daily measurement of campaign
demographics, and the availability of traditional post-buy metrics, such as
Reach / Frequency and GRPs.

(Logo: photos.prnewswire.com/prnh/20080115/COMSCORELOGO)

"Recently released figures from the IAB show that a quarter of all UK
advertising spend was online in 2010, and with increasing budgets comes a
need for real-time reporting and enhanced campaign optimisation
capabilities," said Mike Shaw, comScore director of Marketing Solutions. "We
understand our clients' desire to continuously validate campaign performance
and AdEffx(TM) Campaign Essentials enables them to do that. Digital
marketers and agencies can now accurately, quickly and confidently verify
that their online campaigns were delivered to the correct audience with the
desired reach and frequency."

comScore AdEffx(TM) Campaign Essentials was originally introduced in the
US in 2009 and has been beta-tested with a select group of clients in Europe
over the past several months. Today, comScore is pleased to make these
capabilities available for the entire European market. Some of the key
features that will benefit marketers and agencies are the ability to:

    -- Demonstrate the actual audience composition reached for specific media
       buys
    -- Optimise publishers, placements and creatives based on performance
    -- Compare the performance of online and offline media plans by using the
       same post-buy measures that are used in TV, such as reach, frequency
       and GRPs
    -- Create custom segmentation to allow reporting for specific audience
       target groups
    -- Use the interactive online interface for daily in-flight campaign
       optimisation

"Campaign Essentials allows us to demonstrate how our advertising
inventory reaches the defined target audience, and report GRP measures to
facilitate cross-media comparison. Microsoft looks forward to working with
comScore as we continue to deliver world-class solutions for our
advertisers." - Julie Forey, head of research, data & analytics at Microsoft
Advertising

"Campaign Essentials is an indispensable tool that helps to
professionalise the internet and work at the level we do in other media,"
says Pilar Merchante, research director at Zenith Media. "Not only can we
pick up the pulse of our campaigns but it also gives strategic guidelines for
future campaigns."

"With Campaign Essentials we gained consistency in our search for
effectiveness in our digital campaigns. Thanks to Campaign Essentials we've
implemented new measurement, planning and buying models, like the iGRP,
providing a revolutionary change in our clients' advertising budgets." -
Nacho Suanzes, partner invention at Mindshare

For more information about comScore AdEffx(TM) Campaign Essentials,
please email learnmore@comscore.com.

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.

Berit Block of comScore, Inc., +44-203-111-1758, worldpress at comscore.com