With the development of the network, the previous model of promoting websites one by one has been eliminated, and what replaces this method are search engines. It can be said that now the majority of website traffic comes from search engines, if not all, then there will be a considerable proportion. Therefore, website optimization has become a required course for every webmaster. However, if SEO is overdone, it will be punished by search engines, and if it is not optimized enough, it will not achieve the desired effect. So how to do appropriate SEO?