SEO need to understand and familiar with HTML
 

As SEO need to understand and familiar with HTML and CSS principle and can understand and simple modification. Moreover is the need to understand the web server implementation principle, the client browser implementation principle and browsers render loading page elements of the principle. Only know these, then you can be better to optimize your website. HTML and CSS is not difficult, as long as willing to work seriously to learn two days can be done. A lot of people do not understand, look at code YunHu not because he than someone stupid but because his heart was weak.