If you SEO on your website, at first you should select keyword. Most of the visitor doesn’t visit the page directly to use website address in address bar of a browser. They use just a word on search engine like as Google, Bing, and Yahoo etc. for getting their information and other’s necessary. A visitor what use the word in search box of a search engine for finding out a website that is calls keyword. A right and perfect keyword can help to get better ranking on search engine.