WBMD » Topics » DEFINITIONS OF CERTAIN MEASURES OF USAGE OF THE WEBMD HEALTH NETWORK

This excerpt taken from the WBMD 10-K filed Mar 16, 2006.
DEFINITIONS OF CERTAIN MEASURES OF USAGE OF THE WEBMD HEALTH NETWORK
 
In this Annual Report, we provide information regarding usage of The WebMD Health Network that we have determined using internal technology that identifies and monitors usage by individual computers. As used in this Annual Report:
 
  •  A “unique user” during any calendar month is an individual computer that accesses a Web site in The WebMD Health Network during the course of such calendar month, as determined by our internal tracking technology. Accordingly, with respect to such calendar month, once an individual computer accesses that Web site in The WebMD Health Network, that computer will generally be included in the total number of “unique users” for that month, regardless of the method by which such computer accesses that Web site (i.e., whether directed by an individual or by automated software programs). Similarly, with respect to any calendar month, a computer accessing a specific Web site in The WebMD Health Network may only be counted once as a single “unique user” regardless of the number of times such computer accesses that Web site or the number of individuals who may use such computer. However, if that computer accesses more than one site within The WebMD Health Network during a calendar month, it will be counted once for each such site. A computer that does not access any of the Web sites in The WebMD Health Network during a particular calendar month is not included in the


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  total number of “unique users” for that calendar month, even if such computer has in the past accessed one or more of these Web sites. In addition, if a computer blocks our tracking technology, it will be counted as a unique user in a particular month each time it visits one of our Web sites.
 
  •  A “page view” is a Web page that is sent to the browser of a computer upon a request made by such computer and received by a server in The WebMD Health Network. The number of “page views” in The WebMD Health Network is not limited by its number of “unique users.” Accordingly, each “unique user” may generate multiple “page views.”
 
  •  With respect to any given time period, “aggregate page views” are the total number of “page views” during such time period on all of the Web sites in The WebMD Health Network. “Aggregate page views” do not include page views from our private portals.
 
Third party services that measure usage of Internet sites may provide different usage statistics than those reported by our internal tracking technology. These discrepancies may occur as a result of differences in methodologies applied and differences in measurement periods. For example, third party services typically apply their own proprietary methods of calculating usage, which may include surveying users and estimating site usage based on surveys, rather than based upon our internal tracking technology. Regardless of the measure of usage, if usage data is prepared using a consistent methodology between measurement periods, we believe that it provides useful information over time.


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