Auto part shoppers make up a very specific audience, and we wanted to know the best way to reach them. In a study with Compete, we compared the effectiveness of the Google Display Network (GDN) with traditional homepage takeovers and found that the GDN was the clear winner. In fact, ads on the GDN were able to reach 35% of parts shoppers that don't visit the top portal sites—not to mention a higher concentration of the audience overall.