A data structure defines a target profile for each ad which target profile specifies characteristics of a request to which the ad may be provided in response. An ad server delivers one or more of the plurality of payloads in response to a request from a target. A payload priority is assigned for each...http://www.google.com.tw/patents/US8024221?utm_source=gb-gplus-share專利 US8024221 - System and method for delivering payloads such as ads
