Search engine optimization is the means of affecting the visibility of the website or a web page in a seek engine’s “natural” or unpaid search engine results. In general, the earlier and more frequently a niche site appears in the search engine results list, the more visitors it is going to receive from this search engine’s users. Search engine optimization may target different types of search, including impression search, local seek, video search, news search and industry-specific vertical yahoo and google. SEO uses techniques that modify the coding of respective site to improve its rank naturally from the search results, instead of paying for advertising or a higher position.