TENDO Optimization Consultants utilize the theory that the earlier (or higher) a site appears in the search results list, the more visitors it will receive from the search engine. SEO may target different kinds of search, including image search, local search, video search and industry-specific vertical search engines. This gives a web site web presence. 

SEARCH ENGINE OPTIMIZATION (SEO)
As an internet marketing strategy, SEO considers how search engines work and what people search for. Optimizing a website primarily involves editing its content and HTML and associated coding to both increase its relevance to specific keywords and to remove barriers to the indexing activities of search engines

SEARCH ENGINE MARKETING (SEM)
Search engine marketing is a form of  internet marketing that seeks to promote websites by increasing their visibility in search engines result pages (SERPs) through the use of search engine optimization, paid placement, contextual advertising and paid inclusion.

SOCIAL MEDIA OPTIMIZATION (SMO)
Social media optimization is related to search engine marketing, but differs in several ways, primarily the focus on driving traffic from sources other than search engines, though improved search ranking is also a benefit of successful SMO.