SEO (Search Engine Optimization) is the method of analyzing and constructing individual web pages, as well as entire sites, so that they can be discovered, analyzed, and then indexed by various search engines (Google, Yahoo, Bing, etc.). So, when a website is indexed, it is then ranked and listed in search engines results when users search phrase thru search engines. Through specific techniques and high-quality content, a website can also move up on the rankings of varied search engines.