a. 相关关键词词根排列组合而成 b. 添加一些语气助词 c.问答式的关键词

错字/输入法错误/记忆有误 越长尾关键词针对性越高

Anchor phrase:it helps you know what others think your site is about. How sites link to you has an impact on your traffic from those links, because it describes your site to potential visitors

国际主要搜索引擎关系分析图，分析了各搜索引擎的来源从属关系，搜索引擎的各种分类归属，主流搜索引擎的市场份额等等，对于研究E文SEO，不可不说是一个很有价值的参考。

最常见的就是新建N个blog（称为"splog"，即spam blog），然后再在这些blog里插入大量的商业网站链接，再通过人工或软件在各大知名论坛或网站、blog里留言，传播这些链接。Blogger的blogspot.com被作为spam入口的出现次数不但排在首位，并且总数还超过了随后14个域名的数量总和。

网站管理员工具加上了一个很实用的新功能，即显示网站外部链接（即反向链接）的关键词。即现在你不但可以看到哪个网站上面有链接指向你的网站，你还可以看到别人在进行链接时，是如何描述你的网站的。换言之，通过查看这些关键词，你就可以直接了解别的网站对你的网站或相关文章的描述或评价。

Yahoo支持了新的NOYDIR标签（即No Yahoo! Directory），作用就是防止Yahoo!使用网站在Yahoo! Directory里的标题和描述语句。在网页的头部加入下面的内容即可： < META NAME="ROBOT" CONTENT="NOYDIR" > 或者 < META NAME="Slurp" CONTENT="NOYDIR" >

The classic vertical search optimization of utilizing the Google OneBox results, Yahoo Shortcuts, Ask.com's Smart Answers and so on. So if you are a local business, Google may show Google Local results at the top of Google.com for a localized search. Optimize for those queries and you can have a number one spot for a competitive Google search term.

The reason that query words are highlighted in these various places is to help searchers feel more confident that they are being delivered to the most relevant search results. Too much term highlighting often negates the search experience. The SERP looks too busy. On the flip side, too little term highlighting also negates the search experience because user confidence decreases.