Other ads that are not intent based: TV commericals Billboards Print ads Ads on the sidelines of sports games Viral marketing etc etc etc Comparing Twitt

Other ads that are not intent based: TV commericals Billboards Print ads Ads on the sidelines of sports games Viral marketing etc etc etc Comparing Twitter or Facebook ads to Google ads may not be a clear win, but we've been doing that kind of advertising for much longer. The key is for the advertiser to figure out what kind of ads belong on a service (with the company's help), and for the company to find the best way to track the influence those ads have.