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1、内部优化
seo需要学习什么 竞价排名特点是不点击就不付费，在选择关键词的时候，可以把所有产品的有关的词都选上，比如电脑厂商做竞价时，可以把具体电脑的型号，名称都列出来。
Seo流量=抓取量*收录率(准确来说应该是索引率)*首页率*点击率 。当抓取频次、抓取时间出现异常必然引起抓取量的减少。
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