Social Media networks such as Facebook, LinkedIn, Twitter, etc. allow you to build large lists of contacts and supporters that can help to spread the word about your business and web site. Social Media Optimization (SMO) / Social Media Marketing (SMM) is a form of marketing that focuses on generating traffic, buzz, and building links to your web site by participation in various social media web sites. Some of the most popular social media web sites are listed as below: Facebook Facebook is a service used by businesses and people to network and communicate in real time. It allows you to build lists of friends and interact with people all over the world through profile pages, pictures, videos, message boards, and various technology applications. It supports many different languages and becomes number one social media network in the world. LinkedIn LinkedIn is a popular business-oriented social media web site that allows you to network with business professionals and build a list of contacts. It supports only English and is the leading business social network. Twitter Twitter is a free social networking service that allows you to micro-blog by sending short text messages to others from your mobile phone or using instant messaging from Jabber, Google Talk, etc. Twitter is the most widely used micro-blogging network in the world. YouTube YouTube is a video sharing web site that allows users to upload, view, and share video clips. Successful videos on YouTube can generate millions of views resulting in significant exposure to your business and web site.