NEW YORK, January 29, 2001 - Large companies increased their weekly online ad impressions from 30 million to 37 million during the fourth quarter of 2000 but the online advertising market is still dominated by small and mid-size companies who tend to be dot.coms, according to AdRelevance, a Jupiter Media Metrix (NASDAQ:JMXI) company and innovator in Internet advertising measurement technology. The latest AdRelevance findings reveal that although large companies - companies with quarterly sales of 500 million dollars or more - buy more sites than their smaller counterparts, they are still buying fewer ad impressions on average. According to the data, large companies purchased an average of just 135 million impressions in the fourth quarter of 2000, compared to the 167 million impressions bought by small companies - companies with quarterly sales of 75 million dollars or less. (Note: Averages are determined by median numbers, see 'definitions' below.)

Key findings from the January AdRelevance Intelligence Report - which compares online media buying activities of small, medium and large companies based on the measurement of impressions, spending, unique ads and messages during the fourth quarter of 2000 - include:

• Amazon.com bought the highest total impressions of any large company - 6.2 billion (Table A below)
• Large companies bought an average of 72 sites while mid-size companies -companies with quarterly sales of between 75 million and 500 million - bought just 50.
• Dot.com companies of all sizes bought more impressions than traditional companies of equal size. Mid-size dot.com companies led the way with an average of 453 million impressions purchased during the fourth quarter of 2000 (Table C below).

"Market weary sites have been hoping for the larger, big budget advertisers to jump into the deep-end of the online advertising pool, but the latest AdRelevance data indicate only a gradual increase in online advertising from large companies," said Charlie Buchwalter, vice president of media research for AdRelevance, a Jupiter Media Metrix company. "Dot.coms have been guiding the online ad industry since its inception and the mid-size dot.coms, whose customers are online are continuing to lead."

Table A:	Top 5 Large Companies Ranked by Total Ad Impressions, Fourth Quarter 2000 Source: AdRelevance, a Jupiter Media Metrix company
	Company Amazon.com Microsoft MSN AOL Netscape	Total Ad Impressions 6.1 billion 4.1 billion 3.2 billion 2.6 billion 1.6 billion
	Note: These numbers represent impressions for all banner and button types excluding house advertising.

Table B:	Median Ad Impressions Purchased by Company Size, Fourth Quarter 2000 Source: AdRelevance, a Jupiter Media Metrix company
	Company Size Large Medium Small	Median Ad Impressions (in millions) 135 160 167
	Note: These numbers represent impressions for all banner and button types excluding house advertising.

Table C:	Median Ad Impressions Purchased by Company Size and Segment, Fourth Quarter 2000 Source: AdRelevance, a Jupiter Media Metrix company
	Dot.coms by Size Large Medium Small	Median Ad Impressions (in millions) 140 453 176
	Traditionals by Size Large Medium Small	Median Ad Impressions (in millions) 135 117 127
	Note: These numbers represent impressions for all banner and button types excluding house advertising.

These and other figures are available in the January AdRelevance Intelligence Report, entitled "Advertising Within the Budget: The Relationship Between Advertising and Company Size." The reports are released for sale monthly and are designed to provide customers, news media and industry watchers with a timely perspective on the rapidly changing landscape of online advertising. For more information on AdRelevance and the AdRelevance Intelligence Report, please visit www.adrelevance.com or call 1-888-649-6540.