Difference between SMO and SMM..?

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Social Media Marketing defined as a the use of community media sites to develop backlinks and driving traffic to a website this point distinguishes social media marketing and social media optimization. It Includes a list of the top 25 social media websites which helps a site in terms of popularity, search rankings and to drive links and traffic.
Social Media Optimization is the process of optimizing a website to be more compatible by using a functionality such as RSS feeds and social media submission buttons.