A system configured to execute programing instructions comprising: receiving a fence including an area having a geographic location, a plurality of notifications and their content attributes are associated with the fence; receiving location and speed from a mobile device of a user; determining the mobile device is stationary for a predetermine amount of time; identifying a location attribute for the location of mobile device; aggregating a plurality of location attributes associated with the user; determining an audience profile and audience profile attributes for the user based on the aggregated location attributes; detecting the user has crossed into an area defined by the fence; and in response to detecting the user crossing the fence: determining a conversion probability based on content attributes of the notifications associated with the fence and audience profile attributes of the audience profile associated with the user; selecting a notification based the conversion probability.