1. A system for ranking information, the system comprising: an interface for interfacing with at least one online data or stored user data; a processor executing an application to analyse information derived or inferred at least in part from the online data and stored user data; a relevance engine having inputs from said application and at least one of the following outputs: an output to deliver attention profiles, an output to deliver psychometric profiles, a database storing at least in part data relating to inputs or outputs of the relevance engine or application, wherein said relevance engine further comprises an output to deliver attention rankings and wherein the relevance engine ranks the information based at least in part on one or more of the outputs.