SEO stands for Search Engine Optimization, which is an act of making one website content more search engine friendly to make it rank higher on search engines. The term is used to describe the marketing technique of preparing a website to obtain high rankings on search engines when a relevant search is undertaken.

Search Engines use relevancy to place one website rank higher than another. The relevancy is determined by a various factors such as title tag, meta tags, keyword density, keyword prominence, link popularity among others.