Search engine optimization is the process of improving the visibility of a website on organic (‘natural’ or un-paid) search engine result pages (SERPs). This goal is accomplished through implementation of search engine friendly website architecture, optimized internal navigation and link landscape, as well as optimization of the content (comprised, at a minimum, of readability & usability improvements, and grammatical corrections). SEO is as much art as it is science, but at its core, it is the discipline of making user-friendly & useful content understandable and easily digestible by search engines.
Social media optimization (SMO) is the process of increasing the awareness of a product, brand or event by using a number of social media outlets and communities to generate viral publicity. Social media optimization includes using RSS feeds, social news and bookmarking sites, as well as social media sites and video and blogging sites. SMO is similar to SEO (search engine optimization) in that the goal is to drive traffic to your Web site.
Social media marketing (SMM) is a form of Internet marketing that utilizes social networking websites as a marketing tool. The goal of SMM is to produce content that users will share with their social network to help a company increase brand exposure and broaden customer reach.
Email marketing is the act of sending a commercial message, typically to a group of people, using email. In its broadest sense, every email sent to a potential or current customer could be considered email marketing.