Search engine optimization (SEO) is the process of increasing the quality and quantity of website traffic by increasing visibility of a website or a web page to users of a web search engine.
Social media optimization (SMO) is the use of a number of outlets and communities to generate publicity to increase the awareness of a product, service brand or event. Types of social media involved include RSS feeds, social news and bookmarking sites, as well as social networking sites, such as Facebook, Twitter, video sharing websites and blogging sites.
Search engine marketing (SEM) is a form of Internet marketing that involves the promotion of websites by increasing their visibility in search engine results pages (SERPs) primarily through paid advertising. SEM may incorporate search engine optimization (SEO), which adjusts or rewrites website content and site architecture to achieve a higher ranking in search engine results pages to enhance pay per click (PPC) listings.