Do we really need to explain what Facebook is…unless you have been living under a rock for the last couple of years, you will either have a profile on there or have chosen not to get one!  Facebook is of course the largest most successful social media site in the world.  It has been useful to a lot of businesses using it as a way to market and there have been whole books written on that very strategy.  Personally we’re not convinced and prefer to use LinkedIn for business growth.