Social media optimization (SMO) was originally designed to drive traffic from social media sites such as bookmarking sites and social networks. However, SMO is now significantly more important and not simply because social networking has grown but because SMO also improves SEO performance. Good SMO will drive traffic from both direct social site referrals and from search engines.
List Of Social Media Optimization Activities
Microblogging (e.g. Twitter)
Expertise Sharing (e.g. LinkedIn & Facebook etc.).
Yahoo Answers/Aol Answers
Internet Resource sharing (e.g. Bookmarking)
Image and Video sharing
Music/Audio sharing and Podcasting
Community Participation ( Facebook , Twitter and Linkedin )
Social Networking & reaching target audience
Interest group participation
Create supporters for Causes and Events, etc
Online Reputation Management
Increasing traffic and ROI for sites
Inbound Link Building (Both follow and not followed links)