The primary goal of the spammers is to increase the search engine ranking for their client sites, in a process called "black hat search engine optimization (SEO)" or "Spamdexing".
垃圾信息散布者的主要目的就是提高其客户站点在搜索引擎的排名，这个过程被称为 “黑帽式搜索引擎优化（SEO）”或 “垃圾索引”。
SEO impact: Choosing a primary domain will help avoid duplicate content.
对搜索引擎优化的影响：选择一个主域名将有助于避免重复内容。
Content to have primary and secondary key. SEO why of the articles are in bold text with, this is the objective.
内容要有主次重点。SEO十万个为什么的文章都带有黑体文字，就是这个目的。
Content to have primary and secondary key. SEO why of the articles are in bold text with, this is the objective.
内容要有主次重点。SEO十万个为什么的文章都带有黑体文字，就是这个目的。
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