More and more businesses are using social media to help their businesses grow. Facebook and Twitter are the most used, but there is another site businesses need focus on: Foursquare. Foursquare is a social networking website that allows people to share their location with their friends by checking in at their location. The site has only be around since 2009 but already has over 10 million users. Many people find new businesses by browsing nearby locations and it's a useful free advertising tool that businesses can use Foursquare to gain more customers.