Well, one of the less-understood and -appreciated facts about online targeting in general, and behavioral in particular, is that behind site user activity data there’s a rich array of consumer data in third-party research which can be overlaid with your own data on user online behavior [to] yield whole new levels of understanding.
One treasure trove for us is NielsenNetRatings. What Nielsen has done is study how people in different demographic ‘life stages,’ as they call them, actually have very unique group patterns of online behavior based on where they are in their lives.