对于Meta标签，主要有title、description、keywords三个地方要添加，其余的meta标签可以不加。就重要性而言，title在页面优化中占据绝对重要的位置。
title标题标签告诉用户和搜索引擎一个特定网页的主题是什么。“
”标签通常放在HTML文档的“<head>”标签内。理想情况下，应该为网站的每一个网页创建唯一的title页面标题。</p>
<p>关于title的写作，title标签应该准确描述网页的内容，使用简短但具描述性的标题标签——短的标题同样可以包含丰富的信息。如果标题太长，搜索引擎只会在搜索结果里显示其部分内容。尽量不要堆积太多关键词，如果是长标题，可以包含关键词1～2次，而且关键词不用靠得太近。</p>
<p>description描述标签提供了关于这个网页的总括性描述，网页的标题可能是由一些单词和短语组成的，而网页的描述元标签则常常是由一两个语句或段落组成的。如果网页摘要里的某个词语恰好出现在用户的查询里，那么这个词语将被高亮显示，如果描述标签写得好，可以提升页面的点击率。</p>
<p>关于description的写作，description标签准确概括该网页的内容，每一个网页应该创建各不相同的描述标签，避免所有的网页或很多网页使用千篇一律的description标签。</p>
<p>keywords关键词标签，对于页面优化来说，重要性已经大不如前，甚至有种说法是keywords标签已经没用了，不过就算搜索引擎已经不再考虑keywords，写一下keywords标签可能还会有些作用，不过keywords里面不要堆砌太多关键字，否则可能适得其反，写上四五个核心关键字即可。</p>
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