Now that Pinterest has stopped requiring invites, it’s easier than ever to join. Pinterest is a social sharing site that launched in 2010 and already has an estimated 20M unique visitors per month. It’s now the third most popular social networking site in the U.S, just behind Twitter. Pinterest can be a great tool for small businesses to connect with current customers and attract new ones thanks to engaging images. In a lot of ways, customers do the work for you. If users see a pin and like it, they share it with their friends, who in turn share with their friends, and so on. Not sure how to make it work for your business? Here are 3 things you should know about Pinterest for your business.