外链是怎样影响关键词排名的

1、相关性
　　在和自己网站相关的地方做外链，有利于提高外链的相关性。特别是近这段时间，搜索引擎算法的改变，越来越重视外链的相关性。如果我们是做SEO优化 的网站，我们发外链的地方应该有很多，大部分关于SEO优化，网络优化的我那个站我们都可以去发外链，这样也提高了外链的相关性。 　　在我们分析网站的时候，也可以发现，某一个网站的外链很多，但是没有较好的排名，这是什么原因呢?相信大家都知道，外链的质量对网站的排例如logo设计www.l***名产生了很大的影响。在外链建设方面，我们在注重数量的同时，应该更注重外链的质量。
　　3、稳定性
　　外链的增加和我们网站内容的添加一样，要避免网站的过度优化，过度优化只会给网站带来不利的因素。做外链更是这样，不能三天打鱼两天晒网。在某一时段急剧增加网站的外链，在某些时候有很少做外链，这些都是对搜索引擎不友好的表现。
　　4、友情链接的影响
　　友情链接本身就是一个很好的外链，而且稳定性比较强。交换友情链接的目的也是为了互相分享我那个站的权重，来提高关键词的排名。但是我们需要注意友情 链接的一些不正常或网站降权的情况。笔者网站就遇到过这种情况，很多网站在交换友情链接初期，网站快照各方面都比较正常，但是过一段时间就表现不正 常。那些不正常的网站有可能牵连我们的网站，我们有必要定期检查友情链接，避免出现一些不必要的麻烦http://www.z***/yx/content/2013/xywy_1010/14160.html
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