Abstract: In one embodiment, a non-transitory computer-readable medium contains computer-executable instructions that, upon execution, result in the implementation of operations comprising: receiving from a third party data corresponding to a first collection of users, each user having first data associating the user to a first audience segment; acquiring or creating audience segment validation data using an audience segment validation method on the first collection of users; and transferring or presenting the audience segment validation data in a form of a collection of data or a report. The collection of data or the report may be transferred or presented to an advertiser, an advertising network, or an advertising agency. The audience segment validation method may comprise two or more methods selected from the group: querying a collection of user profile data, targeting users with queries, analyzing user behavioral data, and analyzing audience segment data from a plurality of data sources.