百度搜索引擎在排名网站时，不仅要看网页的信息相关度，同时也会考虑网站的声望如何，比如外部链接有多少，网页的点击率有多高等等。因此一个内容充实的网站肯定会排在内容贫乏的网站前面。 In baidu search engine ranking sites, not only to look at the information relevance of web page, it will also consider how the popularity of the site, such as how many external links, how tall are page views and so on. So an informative website will definitely ahead of sterility website. 所谓搜索引擎优化（Search Engine Optimization,SEO），也就是针对各种搜索引擎的检索特点，让网页设计适合搜索引擎的检索原则（即搜索引擎友好），从而获得搜索引擎收录并在排名中靠前的各种行为。如对于基于META标签检索的搜索引擎，在META标签中设置有效的关键词和网站描述，对于以网页内容相关性为主的蜘蛛型搜索引擎，则通过在网页中增加关键词的密度，或者专门为搜索引擎设计一个便于检索的页面（如sitemap.htm、roberts.txt）。搜索引擎优化是搜索引擎营销的常见形式之一。 So-called SEO (Search Engine Optimization, SEO), which is according to the characteristics of all kinds of Search engines retrieve web design suitable to the Search Engine retrieval principle (i.e., Search Engine friendly), so as to get Search Engine indexes and the front of the various behaviors in the rankings. As for search engine based on META tags to retrieve, setting up effective keywords in the META tags and site description, to give priority to with web content relevance of search engine spiders type, by increase the density of keywords in the page, or specially designed for search engines to search page (such as a sitemap. HTM, Roberts. TXT). Search engine optimization (seo) is one of the most common form of the search engine marketing.