If there were any doubt that Google is primarily an advertising company, not a search company, that doubt is eliminated today with the news of Google's purchase of dMarc. dMarc provides an automated advertising solution that puts ad spots on radio. dMarc enables advertisers to pick stations, target demographics, and upload digital content. The automated service allows for swift campaign changes and greater accountability than traditional ad brokering on radio. It'll be fasinating to see what Google does with this company and its technology.