Abstract: A method, advertising network, and computer program product for constructing a ranked user graph for advertisement targeting. The method commences by selecting a user from a set of candidate users from a first internet site, then identifying membership of the user in at least one second internet site. Having the intersecting membership, then assembling a set of one or more relationship associations between the user and a set of the user's associates (e.g. as retrieved from the second internet site). The relationship associations have various aspects that relate the user to a particular associate, and scoring or ranking of those various aspects are used in applying weights the relationship associations. Privacy settings are applied in order to filter out certain associations and/or to restrict propagation of information that the user or other authority deems as private information. The ranked user graph is used in delivering advertising to the user's associates.