A facebook is a great tools for our online business it's one of my main source when i need some referrals but of course it's not easy as pie you need to explain them what is all about but i don't have such time i have many friends who's into online business also when i need some referrals then i introduce them the program and ask them to join under me. A facebook and other social networking site is indeed very useful because we can sell some stuffs there we can find some clients. it's a very big help for small businesses because it's a place where we can advertise our products for free and very convenient way.