"Email consistently and undisputedly provides the biggest returns in digital marketing, and is leaps and bounds more effective than traditional advertising channels like TV and radio."--Chad S. White, Director of Research at Litmus.
That's a pretty bold statement, and it's backed up by hard facts. In a Litmus report, we find that the average ROI for email marketing is 38:1. That means for every $1 you spend, you're getting $38 in return.