The Question "what is seo" is asked by millions of user in Entire Digital World. Toady I will explain the term "seo" and it’s all components. seo is short form of 'search engine optimization'. The Process of optimization digital contents on various search engines is known as seo. lets discuss briefly , We know that entire world have thousands of search engine Google, Yahoo , Bing , Msn , ask , duckduckgo etc but one of the most popular is Google search engine , 98 % of internet user prefer Google as a search engine. So term 'seo' is explained by largest search engine Google . The Process of optimization of any digital contents (Images , Words and Videos ) is seo .this is the technique to promote our digital contents on search engine.