SEO is abbreviated as Search Engine Optimization. The objective of SEO is to increase traffic of the websites using various techniques. Search engines like Google, Yahoo and Bing go through all the pages of websites using programs called "Crawlers" on the internet to collect information and store. Search engines use a specific search algorithm to show results based on keywords searched. SEO is primarily used to order the way keyword-based links are shown to the end user. A prospective customer or buyer search for informaiton on the Internet when a seller gets listed based on the level their site is positioned. The technique of showing results on top may be accomplished using organic or paid methods.