SMO - Social Media Optimization - is a phrase first coined by Rohit Bhargava: "The concept behind SMO is simple: implement changes to optimize a site so that it is more easily linked to, more highly visible in social media searches on custom search engines (such as Technorati), and more frequently included in relevant posts on blogs, podcasts and vlogs." Social media networks which can be used for Search Engine Marketing purposes include MySpace, Digg, Deli.cio.us, reddit! HubPages, Squidoo, Friendster, BlueDot and many other emerging projects.