A computer-implemented method for determining a zone of relevance for locating wireless subscribers of interest to a location based application and making a user notification decision including: obtaining application specific information from an application service provider; obtaining wireless subscriber profile and real time information from a serving wireless network operator; accessing a geographical database to extract related geographic information; extracting relevant dynamic inputs from external sources; determining the value of user notification based on weighting of said extracted information and historical use information; and determining a corresponding zone of relevance wherein notifying the user meets certain criteria for the determined value of notification.