forbes.com | http://goo.gl/tSdIV
But the new ROI of marketing goes even further than investments and impressions. It also encompasses return on engagement, objectives, and opportunity. Today, people share information via the social web faster and more frequently than ever. Traditional ROI analysis is just the tip of the iceberg. The really interesting part of the story is what happens beneath the surface of the water. The hard metrics related to return on investment barely touch the surface.