首页 > seo优化知识 > nofollow标签背后的秘密
2015
06-06

nofollow标签背后的秘密

nofollow标签对那些老站长而言估计都再清楚不过了,但是有些新手可能还是第一次听说这个名词。如果我们不告诉这些新手nofollow标签的作用,我想他们大多都不会去做nofollow标签。这样一来,他们就会错失一个提升站点优化效果的方法。今天我就给那些seo新手分享点福利,跟大家来谈谈这nofollow标签背后的秘密。

Nofollow标签的定义:

在百度百科中nofollow标签定义为告诉搜索引擎”不要追踪此网页上的链接”或”不要追踪此特定链接。简单的解释就是当咱们不想被搜索引挚抓取友情链接版块时,那么可以在友情链接版块的链接中加上nofollow标签来告诉搜索引挚这个版块的内容不可以爬行抓取。如果咱们不想A链接所在的页面被爬行抓取时,可以在A链接上增加nofollow标签告诉搜索引挚这条链接可以放弃追踪了。Nofollow标签在优化中就是一种拒绝蜘蛛爬行抓取的意思。

Nofollow标签的写法:

很多seo新手对于nofollow标签的写法还是不了解,一般的nofollow标签主要应用于自己不想被追踪的链接上面,常见的写法如下:

1、将”nofollow”写在网页上的meta标签上,用来告诉搜索引擎不要抓取网页上的所有外部和包括内部链接。

如:<meta name=”robots” content=”nofollow” />

2、将nofollow标签加在某个超链接中,告诉搜索引擎不要抓取该链接所指向页面的所有内容。

如:<a href=”http://www.dxqseo.com/seojc/” rel=”nofollow” >武汉seo</a>

nofollow标签背后的秘密 - 第1张  | 武汉seo小强

接下来干货来了,nofollow标签背后的秘密:

1、Nofollow标签限制蜘蛛爬取链接,被加上nofollow标签的外链无权重传递作用

有些网站为了避免被页面上的外部链接分走权重,于是对出现在页面上的外部链接进行了nofollow设置,那么这样的链接就没有权重传递效果,如果还没有链接诱饵的作用(比如搜搜问问),那么就应该果断的停止该处外链的发布,让网站管理们玩单机去吧,比如网易博客、创业吧空间。

2、Nofollow标签的有无是交换友情链接时必须考察的因素之一

我们都知道,换友情链接并不是为了从对方网站上获得那么丁点的点击流量,而是为了提高网站权重的效果,有些站长会在友情链接部分加上nofollow标签,导致该友情链接失去了本来的意义,这种行为是属于欺骗行为,当然有些站长在和你换友情链接的时候没有nofollow标签,等到换了一段时间偷偷的加上nofollow标签,要避免这种情况就要求你隔一段时间就将和自己换友情链接的网站好好的检查一遍过去,遇到这种情况就必须果断立刻马上撤掉对方的链接。

3、Nofollow标签只是防止权重输出,并不能避免权重损失,但能引导蜘蛛的爬行

比如当你的页面上有5个外部链接,那么每个外部链接得到的权重为1/5,而你在其中的一个外部链接上添加了nofollow标签,使得蜘蛛不爬取这一个链接,那么剩余的4个外部链接得到的权重一样还是1/5,页面的权重一样会分给这5个链接,只是其中被设置了nofollow标签的链接所获得的权重是丢失而没有形成传递,这看似是一种“损人不利己”的行为,但是也有好处的,这样可以引导蜘蛛的爬行,让有带宽限制的蜘蛛在有限的时间,爬取到更多的页面。

4、Nofollow 和 External nofollow

从字面上意思来看,nofollow是“不要追踪”,而extenal nofollow 则是“外部的不要追踪”,也许你已经看出来了,他们两根本就是同一个意思,external nofollow 只是nofollow比较规范的书写而已,不用纠结,他们是一个意思!

总结:虽然Nofollow标签可以运用于地方很多,但还是希望seo新手在操作时可以合理使用,千万不要做那些损人不利己的事情。


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