For Immediate Release:

NetRatings, Inc.

Maria Bumatay(408) 586-7560 Max Heineman (212) 703-5953

mbumatay@netratings.com mheineman@netratings.com

Sven Haarhoff/Point Marketing Communications, Inc.

(503) 636-0022

sven@pointmarcom.com

NETRATINGS LAUNCHES CENSUS-BASED MEASUREMENT SERVICE FOR ONLINE MEDIA AND PUBLISHING COMMUNITIES

SiteCensus Expands The Comprehensive Nielsen//NetRatings’ Comprehensive Online Research Product Portfolio

NEW YORK — April 21, 2003 —NetRatings (Nasdaq: NTRT), the provider of Nielsen//NetRatings, the global standard for Internet audience measurement and analysis, today launched SiteCensus, a census-based site measurement service that arms marketers and sales teams with trusted third-party validation of Web site circulation. SiteCensus provides a focused, site-centric approach to audience analysis, delivering detailed information for niche and local market research needs.

As part of the Nielsen//NetRatings family of Internet research services, SiteCensus addresses the emerging business needs of media companies, content publishers and other Internet companies with in-depth measurements of key metrics, including visitors, page views, time spent and site demographics. SiteCensus expands the Nielsen//NetRatings product line by providing an intelligent solution for companies that are looking for comprehensive data and research metrics about their own sites or network of sites. The service sets a new standard for small Web site audience reporting through the following important benefits:

• Provides focused and detailed research analysis for sites with smaller audience sizes
• Complements the Nielsen//NetRatings NetView Random Digit Dial measurement service and supplements larger size Web sites with different levels of site-centric analysis
• Offers complete Web site total network circulation, reporting on data for content area audiences - within a site or network of sites
• Delivers precise regional and local market tracking, along with gender, age and client specified custom demographics
• Justifies ad rates by showing prospects how client Web sites reach specific demographics
• Tracks a site’s entire audience, including traffic from wireless and hand-held devices, Internet appliances, shared home and office computers, university PCs, as well as public terminals including libraries and Internet cafes
  
  

“SiteCensus combines sophisticated demographic sampling, custom research and superior tracking technology, strengthening our existing arsenal of Web measurement research products,” said William Pulver, president and CEO, NetRatings. “SiteCensus serves as a comprehensive intelligence source, developed strategically to provide insightful and detailed measurement on Web site activity.”

The service’s census-based measurements are provided through a page-tagging system. When encoded in any Web site page, the tag provides an accurate and direct count of every page view and visitor, while also selecting and surveying a representative sample of the audience.

Nielsen//NetRatings created SiteCensus in partnership with SelectMetrics, Inc., a privately held Portland, Oregon-based technology research and development company that creates advanced online audience measurement technologies.

SiteCensus joins the Nielsen//NetRatings product portfolio to provide the industry with complete Internet audience research. SiteCensus is currently available in the U.S., with service planned for key international markets. NetRatings continues to strategically develop intelligent research solutions for the industry, providing a comprehensive line of products and services, including:

• NetView (Internet audience measurement)
• AdRelevance (Online advertising intelligence—available in the U.S.)
• @Plan (Target-marketing platform for Internet media planning, buying and selling—available in the U.S.)
• MegaPanel (Ecommerce transaction data and detailed consumer spending behavior analysis)
• WebRF (Online reach and frequency planning tool)
• Analytical Services (Custom analyses and research)

About SelectMetrics, Inc.
SelectMetrics, Inc. is a privately held technology research and development company that develops advanced online audience measurement technologies. Corporate headquarters is located at 921 SW Washington St., Suite 800, Portland, Oregon 97205.

About Nielsen//NetRatings

Nielsen//NetRatings is the global standard for Internet audience measurement and analysis and is the industry's premier source for online advertising intelligence with its NetView, AdRelevance, @Plan and WebRF services. Covering 70 percent of the world's Internet usage, the Nielsen//NetRatings services offer syndicated Internet and digital media ratings reports and custom-tailored data to help companies gain valuable insight into their business. For more information, please visit www.nielsen-netratings.com.

About NetRatings, Inc.

NetRatings, Inc., (Nasdaq: NTRT) is the provider of the Nielsen//NetRatings services, which set the global standard for Internet audience measurement and analysis. Nielsen//NetRatings enables its customers to make informed business-critical decisions regarding their Internet strategies with its technology driven products and services, which include the Nielsen//NetRatings NetView Internet audience measurement service, AdRelevance online advertising intelligence, @Plan Web user lifestyle, demographic and product brand preferences data, WebRF, an Internet reach and frequency planning tool, and custom data, research and analysis.

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Safe Harbor Statement

This press release contains statements that may constitute forward-looking statements pursuant to the safe harbor provisions of the Private Litigation Reform Act of 1995. These statements are based on current expectations and assumptions and involve a number of uncertainties and risks that could cause actual results to differ materially from those currently expected. Information about potential factors that may affect NetRatings' business and financial results is included in its annual report on Form 10-K for the year ended December 31, 2002 and its quarterly reports on Form 10-Q, including, without limitation, under the captions "Management's Discussion and Analysis of Financial Condition and Results of Operations" and "Risk Factors That May Affect Our Performance." Each of these documents is on file with the SEC and is available free of charge. NetRatings does not undertake to update any forward-looking statement that may be made from time to time by it or on behalf of NetRatings.