1. A method of online advertising comprising: Receiving at least one generic ad request for a generic advertiser; Providing geo-target availability based on a number of requested impressions for the generic ad request and a web site designation for the generic ad request; Receiving geographically targeted ad requests including target information from one or more child advertisers at an ad server node; Determining a media buy output based on the received geographically targeted ad requests and the generic ad request.