NEW YORK, October 2, 2000 - AdRelevance, a Jupiter Media Metrix Company (NASDAQ: JMXI) and innovator in Internet advertising measurement technology, today unveiled a major breakthrough in Web-measurement technology with the launch of AdRelevance 2.0, the first online measurement system to combine server-side tracking and second-generation intelligent agent technology with panel-based online measurement data. AdRelevance 2.0 is a brand new platform for tracking and comparing online advertising activity with unparalleled accuracy across all major industries, channels, ad formats and ad types, including banners, buttons and rich media.

Powered by AdRelevance's new proprietary Cloudprober Web-sampling technology, AdRelevance 2.0 is the first and only online advertising measurement technology to dynamically respond to Web traffic patterns, thereby capturing the most timely and accurate ad data, even from Web pages that may only be live for a day. The AdRelevance 2.0 platform also includes the new AdRelevance AdContact sales prospecting tool and the AdAlert email notification system.

"Back in 1999, AdRelevance forever altered the online advertising industry with the debut of its successful ad tracking technology. Today, AdRelevance is proud to be the first in the online ad measurement industry to introduce the only second-generation product - an incredible breakthrough in Web-sampling technology," said Will Hodgman, president of AdRelevance, a Jupiter Media Metrix Company. "No other Web-measurement system out there combines server-side tracking and second-generation intelligent agent technology with panel-based online measurement data. AdRelevance 2.0 underscores our commitment to always be a generation ahead."

AdRelevance 2.0: Cloudprober Technology Defined
Cloudprober, the cornerstone Web sampling technology of AdRelevance 2.0, is the first and only online ad tracking technology to actively adjust itself as the Web breathes and evolves - automatically deciding what Web pages to visit and how often to visit them based on actual traffic patterns. AdRelevance's Cloudprober intelligent agent is fueled by the unique combination of Media Metrix clickstream panel data and highly granular server-side traffic data. Using rich traffic data and geographically distributed probes to dynamically respond to Web traffic patterns, AdRelevance ensures the most representative and balanced tracking of virtually all online ad activity across 13 US regions.

In addition to Cloudprober proprietary Web-sampling technology, AdRelevance 2.0 is equipped with the most advanced system for classifying ads: Automatic Ad Detection, or AAD for short. A proprietary image matching technology, AAD instantly identifies, captures and classifies ads across hundreds of thousands of sites, channels and sub-channels, twenty-four hours a day, seven days a week. All ads are categorized according to AdRelevance's unique classification system that sorts by advertiser, industry, industry segment, product/service and product /service segment.

Key industry benefits of AdRelevance 2.0 include:

• Measuring Rich Media: From Flash to Enliven to custom Java banners and interactive ads, AdRelevance 2.0 reports all the most popular emerging ad types.
• Granular Reporting: AdRelevance 2.0 captures ad activity on all levels of a site that receives visitor traffic, including channel and sub-channel measurement.
• Exhaustive Measurement: Impressions, rate-card equivalent spending and creative content are provided for all standard ad sizes, including banners, buttons and rich media.
• Comprehensive Coverage: AdRelevance measures and reports ads on over 1000 sites and more than half-a-million URLs.
• Unparalleled Accuracy: AdRelevance Cloudprober technology probes higher trafficked pages more frequently, thereby capturing all online ad activity at any given moment in time.
• More Ads: The number of ads captured per week will almost double from approximately 6,000 to 10,000.

"AdRelevance 2.0 raises the bar across the board for online advertising measurement technologies," said Gerard Broussard, Senior Director at OgilvyOne. "Data quality is number one for us, and we've been impressed with AdRelevance's commitment to work with OgilvyOne to make AdRelevance 2.0 a quality ad measurement service."

"AdRelevance 2.0 is the only second-generation online advertising measurement product on the market. AdRelevance's radical new Cloudprober technology is the difference between a crawling spider view of the net and a panoramic perspective from 60,000 feet above the Web," said Marty Levin, executive vice president of sales and marketing at AdRelevance, a Jupiter Media Metrix Company. "While the rest of the industry fine tunes their debut technologies, AdRelevance is concentrating on what's next - a combination of advanced technology and easy-to-use features, driven by a year of enthusiastic customer input."

AdRelevance 2.0: AdContact Sales Prospecting Tool
AdContact, AdRelevance's all-in-one sales prospecting tool, provides Web publishers and all online businesses selling ad space with key media buyer contact information directly in the AdRelevance Web-based interface. Offering a continually updated database of the top 5000 Internet advertisers' media buyers, AdRelevance AdContact enables Web marketers to identify key sales prospects with just a few clicks. AdContact will be available within the month.

AdRelevance 2.0: AdAlert Email Notification System
AdRelevance AdAlert is the very first online advertising tracking service available that automatically pushes competitive intelligence and advertising sales opportunities to a user's desktop. AdAlert enables Web advertising professionals to specify companies, products or Websites they want to closely monitor on an ongoing basis. When an advertising event they define happens, AdAlert automatically sends an e-mail indicating which alerts have been "triggered." The e-mail includes a link to a customized Web page with all the details of the alert.

For more information on AdRelevance 2.0, including AdContact and AdAlert, and a free demo or trial of the service, please visit www.adrelevance.com or call 1-888-649-6540.

Editors Note: Unless otherwise noted, please source all data as the following: AdRelevance, a Jupiter Media Metrix Company

About AdRelevance, a Jupiter Media Metrix Company
AdRelevance, a Jupiter Media Metrix Company, is an innovator in Internet advertising measurement and ad tracking technology. The company's advanced intelligent agent technology systematically and continuously scours the commercial Web universe, collecting online advertisements from more than half a million URLs. With data on more than 200,000 unique ads, representing more than 15,000 advertisers, the innovative AdRelevance service provides advertisers, agencies, media companies and marketers with critical information that tells them where, when and how competitors and potential clients are advertising on the Internet. For more information on AdRelevance and a free trial of the service, please visit www.adrelevance.com or call 1-888-649-6540.

About Jupiter Media Metrix
Jupiter Media Metrix, formed by the merger of Jupiter Communications and Media Metrix, is a global leader in market intelligence for the new economy. The Company delivers innovative and comprehensive Internet measurement, analysis, intelligence and events to provide businesses with unmatched global resources for understanding and profiting from the Internet. Jupiter Media Metrix brings together world-class, innovative and market-leading products, services, research methodologies and people. Jupiter Media Metrix brands include Media Metrix, AdRelevance, Jupiter Research and Jupiter Events. The Company is headquartered in New York City and operates worldwide, across the Americas, Asia Pacific, Europe (as Jupiter MMXI Europe), and the Middle East. Visit us at www.jmm.com for more information.