Four years ago, there was no such thing as Pinterest. Facebook was on the rise pre-The Social Network, people were still learning how to retweet, and many businesses had little to no idea about the power of social media. Last year, Pinterest users rose by 430%, making it the 26th most visited site on the web (“Great.”), driving more traffic to websites than YouTube, LinkedIn, and Google+ combined. Combined! (“Wow!”) It was obviously a phenomenon not ignored by savvy marketers.