This document discusses several social media platforms that are useful for businesses: Wordpress is recommended for blogs as it offers variety of themes and apps/widgets; Facebook is useful for businesses to create individual and fan pages to engage 500+ million users by being social and providing solutions; Foursquare is good for businesses with physical locations that customers visit; LinkedIn helps connect businessmen and index business pages in Google quickly; Twitter allows unlimited tweets to build followers by being social; YouTube provides viral power through creative videos that gain subscribers.