NEW YORK, February 28, 2001 - Jupiter Media Metrix (NASDAQ: JMXI), the global leader in market intelligence, today reports that online ads reached a record level of over 172 billion impressions during the fourth quarter of 2000 while top Web media companies stocked 28 percent of their sites with non-paid self-promotional ads. According to AdRelevance data released today at the Jupiter Media Forum, entertainment and society Web sites ran the highest percentage of self-promotional ads (30 percent) among ad supported Web sites. Jupiter analysts assert, however, that sites using too many house ads dilute their advertisers' messages, at a time when they badly need to be proving a return on investment (ROI) to those advertisers.

Highlights from the research include:

• Jupiter analysts project that consumers will face an average of 950 marketing messages per usage day by 2005 (see Table A). The cluttering of messages can affect the performance of ads and will hurt Web publishers as pay-per-performance pricing increases, say Jupiter analysts.
• Twenty-two percent of ads on news and information Web sites during the fourth quarter of 2000 were house ads, compared with 19 percent on portals and search engines, according to AdRelevance data (see Table B). Only portals did not experience an increase from the third quarter.
• AdRelevance data show that house advertising levels inched upward all year, hovering around 15 percent early in the year and rising to 28 percent by the end of the year. According to Jupiter analysts, that increase can be partially attributed to a growing Web audience that create a need for media companies to fill gaps on Web pages.

"Market negativity has increased the need for advertisers to realize greater ROI from their online campaigns. The cluttering of marketing messages on Web sites has inhibited performance for online advertising and placed publishers in peril," said Mike May, research director and senior analyst for Jupiter Media Metrix. "House ads can serve a legitimate purpose for media companies, but they need to limit those that are used as mere placeholders and instead focus on demonstrating the value of the medium to their clients, and the industry at large. To reduce clutter, Web publishers should use house ads more strategically, freeing up opportunities for their clients to shine."

Table A:	Consumer Exposure To Marketing Messages Online Source: Jupiter Media Metrix
	Year	Marketing Impressions Per User Per Day
	2001	610
	2002	705
	2003	800
	2004	880
	2005	950

Table B:	Percent House Ads by Genre Source: Jupiter Media Metrix
	Genre	Percent of Inventory Devoted to House Ads
	Portals and Search Engines	19%
	News and Information	22%
	Entertainment and Society	30%

More information on this and other research related to Web publishing and media will be available at the Jupiter Media Forum in New York City from February 28 - March 1 at the Sheraton Hotel & Towers.

Definitions
Impressions: The number of times an ad is rendered for viewing. One impression is equivalent to one opportunity to see an ad.
Genre: Exclusive groups of sites that are similar in content and function. Sites are considered as a whole; individual subsites are not assigned to genres.

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.

Editors Note: Unless otherwise noted, please source all advertising measurement data as the following: AdRelevance, a Jupiter Media Metrix company. Clutter data is from Jupiter Research, a Jupiter Media Metrix Company.