As the line between TV and internet blurs, advertisers are making big moves to digital. To find out how to help them reach TV audiences online, we compared the efficacy of the Google Display Network (GDN) with buys on major portal sites. The results were very clear: GDN reached 4x more people than the Yahoo! homepage. Additionally, GDN could reach 50% of all fans—fans that wouldn't be reached through any portal.