Social media optimization (SMO) is a set of methods for generating publicity and traffic through social media, online communities and community websites.

SMO is the process of promoting your site or business through social media channels and it is a powerful strategy that will get you quality links, attention and massive amount of traffic.

Those who ignore the efficacy of social media usually fall into three categories; the ones who don’t know much or anything about social media, the ones who are interested but don’t know how to use it and those who don’t believe in the value that a social media strategy can be effective for their website or business.

SMO tactics can drive huge amounts of people to a website and can also determine whether a startup, website or idea will make it or not. It involves driving traffic to a website through new channels because search engines aren’t the only sites that drive big traffic anymore. While it’s not taking over SEO yet, it has the potential to someday soon.

It’s natural. Not only do you get natural links without any discernible pattern, your website is exposed to large groups of people in a spontaneous fashion. This differs from paid advertising which has overt commercial overtones.
It’s defensible. Once successfully mastered, social communities can be a great source of web traffic on top of any traffic you are already receiving from search engines. While you can’t easily increase your search engine traffic, social media traffic can be very easily controlled through strategic marketing.
Its low-cost/high returns. If done by SEO team, costs are limited to only time and perhaps the expenses involved in resources. The benefits will often exceed the cost. It would take you thousands of dollars to buy many links; social media has the ability to give you that for free.
It complements other efforts. Social media optimization and marketing is usually community-specific. It doesn’t interfere with any other methods of getting traffic to your website. It can and will fit perfectly with an advertising campaign targeting other websites or search engines.

Community marketing is a strategy to engage an audience in an active, non-intrusive prospect and customer conversation. It’s a place where people share their thoughts and votes for different sites of their favorite topic.

Social bookmarking is a method for Internet users to store, organize, search, and manage bookmarks of web pages on the Internet with the help of metadata.

In a social bookmarking system, users save links to web pages that they want to remember and/or share. These bookmarks are usually public, and can be saved privately, shared only with specified people or groups, shared only inside certain networks, or another combination of public and private domains. The allowed people can usually view these bookmarks chronologically, by category or tags, or via a search engine.

Social Bookmarking websites drive qualified traffic because more and more consumers use them as "trusted" search engines that deliver better results than Google or MSN.
Social Bookmarking a website will increase the link popularity, because search engines "index" the pages within these sites, and will see the links to your website.
Social Bookmarking, we predict, will eventually affect the actual rankings in the "organic" search engines as they begin to factor social bookmark scores into the algorithms that generate search results.