Abstract Along with Internet's fast development, the network promotion is getting more and more popular, but the search engine has become the customer understanding enterprise website main way, the cnnic report of investigation showed that 80% website current capacity come from the search engine, therefore the enterprise website optimizes in view of the search engine is the present enterprise quite commonly used promotion way. Seo is through understood how each kind of search engine does capture the Internet page, how to carry on the index as well as how to determine it to some specific key word's technologies and so on search result place, comes to the homepage to carry on the related optimization, makes it to enhance the search engine place, thus enhances the website visit quantity, promotes the website finally the marketing capacity or the propaganda ability technology. seo is an search engine marketing method, the search engine marketing is a network marketing method, the network marketing is a website operation part, the website operation final goal gains the profit, therefore the seo goal is causes the website to obtain the profit. The present paper from the seo definition, the principle of work, the technology and the cheating behavior, elaborated seo simply finally through a website case in the commercial website application. Key word |: seo Network promotion Search engine marketing commercial website
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