Search engine optimization (SEO) is the process of improving the volume or quality of traffic to a web site or a web page from search engines via "natural" or un-paid search results. The theory is that the earlier (or higher) a site appears in the search results list, the more visitors it will receive from the search engine. For example, if you are searching for cars, most users will click on links located on the first few pages. Thus, optimizing your website can help it being seeing first to get you more business. 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.
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.