Abstract:

The Internet is not at all easy to measure consistently and, importantly, in a way that is relevant to media buyers and sellers. This is, at least in part, why the Internet has struggled to grow its share of advertising spend. Site-centric methodologies are useful in determining the absolute number of pages served by a site and can provide complementary information to user-centric metrics. However, the basic audience information that advertisers are accustomed to when planning and evaluating campaigns using traditional media can only be provided consistently and meaningfully by panel-based measurement systems.