SEO is the abbreviation of English SearchEngineOptimization, and Chinese translation is "search engine optimization". SEO refers to the technology and process of obtaining website traffic from natural search results. SEO refers to the internal and external adjustment and optimization of the website on the basis of understanding the natural ranking mechanism of search engines, so as to improve the natural ranking of keywords in search engines and obtain more traffic, thus achieving the purpose of website sales and brand building.

Website promotion is a new marketing method based on the Internet, which uses the interaction of information and online media to assist the realization of marketing objectives. At present, the common communication and promotion methods are mainly realized by buying advertisements among major website promotion service providers. Free website promotion includes: SEO optimizes the content or structure of the website to improve the ranking of the website in search engines, publishes information on forums, Weibo, blogs, WeChat and other platforms, and publishes external links of the website on other popular platforms.