The real SEO should be standing in the position of the enterprise, from the user's point of view, summarize the ranking law of the search engine, make appropriate adjustments to the website, so as to obtain the ranking and bring customers to the enterprise. There are many people who think that SEO is nothing but sending external chains, and even buying external chains to achieve rapid weight improvement, so as to improve the ranking of the website. This may be able to see a certain effect in the short term, but if the long-term operation, not only can not bring a good ranking for the website, but may let the website be punished by the search engine, so that the website is difficult to survive in the search engine.