Google, which built a multibillion-dollar empire on Web ads spanning four lines of simple text, is aggressively branching out in new areas of online advertising including interactive units, mobile ads and video text-overlays.

These initiatives and others are aimed at helping Google continue its rapid growth, which relies almost entirely on advertising revenue. Google has tentacles reaching into nearly every aspect of advertising—not just the Web and mobile but print, TV and radio as well.

For b-to-b marketers and ad buyers, the challenge is to figure out which Google directions are worth following, particularly in a b-to-b market where targeting is often more important than mere reach. Read the complete article on BtoBOnline.