2013 will house some of the biggest growth spurts in digital marketing that we’ve ever seen. The number of social network users is growing astronomically. There are now over 1 billion smartphone users on the planet and 175,000 new blogs born everyday. It’s clear that social, content, and mobile / SMS marketing are a key trio marketers will be focused on in 2013. Here are some fresh statistics to wet your whistle… via SlickText.com.