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2008年12月5日

在链接中使用nofollow - Google_SEO帮助文档(十一)

Be aware of rel="nofollow" for links

在链接中知道如何运用nofollow

Setting the value of the "rel" attribute of a link to "nofollow" will tell Google that certain links on your site shouldn't be followed or pass your page's reputation to the pages linked to. Nofollowing a link is adding rel="nofollow" inside of the link's anchor tag.

给链接添加rel参数为nofollow可以告诉google:这个链接不要跟随。不跟随链接只要在链接中添加rel="nofollow"就可以了。
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If you link to a site that you don't trust and don't want to pass your site's reputation to, use nofollow

如果你链向了一个你不信任的站点,你怕网站的权重流失,你可以使用nofollow标签

When would this be useful? If your site has a blog with public commenting turned on, links within those comments could pass your reputation to pages that you may not be comfortable vouching for. Blog comment areas on pages are highly susceptible to comment spam. Nofollowing these user- added links ensures that you're not giving your page's hard-earned reputation to a spammy site. Many blogging software packages automatically nofollow user comments, but those that don't can most likely be manually edited to do this. This advice also goes for other areas of your site that may involve user-generated content, such as guestbooks, forums, shout-boards, referrer listings, etc. If you're willing to vouch for links added by third parties (e.g. if a commenter is trusted on your site), then there's no need to use nofollow on links; however, linking to sites that Google considers spammy can affect the reputation of your own site. The Webmaster Help Center has more tips on  avoiding comment spam, like using CAPTCHAs and turning on comment moderation.

什么时候使用nofollow比较合适呢?比如你的站点有一个博客有一些公开评论,里面有一些不受信赖的用户评论或留言簿条目。有很多的群发者会使用文章评论这个功能,不跟随这些链接,这样你的网站权重就不会流失。  有很多的博客软件可以自动发表垃圾评论,要手工处理这些垃圾博客看来是不太可能的。同样的建议可以运用在网站的交流部分,类似于留言本,论坛,目录名册等。如果你可以为一些第三方的链接(你网站的一些可信的评论)做担保,你就没有必要给他们使用nofollow标签了,尽管如此,假如你链接到一些不好的网站也会影响你网站在google中的表现。网站管理员中心提供了一下这方面的信息:avoiding comment spam, like using CAPTCHAs and turning on comment moderation.

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A comment spammer leaves a message on one of our news posts, hoping to get some of our site's reputation

在我们的一则新闻上存在一条垃圾评论,它希望能够获得我们站点对他的一个投票。

Another use of nofollow is when you're writing content and wish to reference a website, but don't want to pass your reputation on to it. For example, imagine that you're writing a blog post on the topic of comment spamming and you want to call out a site that recently comment spammed your blog. You want to warn others of the site, so you include the link to it in your content; however, you certainly don't want to give the site some of your reputation from your link. This would be a good time to use nofollow. 另外一个使用场合:假如你发表一篇文章,想引用一个网站,但是你又不想让你的权重流失。举例来说,想象一下你正在写一篇关于群发类的文章,你在文中可能要引用一些网址,告诫读者要注意这些网站,同时你肯定不希望给这些链接做投票,这时候使用nofollow就是最合适不过了

Lastly, if you're interested in nofollowing all of the links on a page, you can use "nofollow" in your robots meta tag, which is placed inside the <head> tag of that page's HTML. The Webmaster Central Blog provides a helpful post on  using the robots meta tag. This method is written as <meta name="robots" content="nofollow">.

最后,如果你对不索引整页的链接感兴趣,你可以使用Meta标签的robots属性,设置值为"nofollow",通常这个标签是位于<head>标签内,使用的方式如:<meta name="robots" content="nofollow">。Google站长中心提供了一个帮助性的文章

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This nofollows all of the links on a page

告诉爬虫不要索引页面中的所有链接

搜索引擎优化指南内容导读:

  1. 搜索引擎优化指南前言 - Google_SEO官方帮助文档中文版(一)
  2. 创建独一无二,准确的网站标题 - Google_SEO帮助文档(二)
  3. 使用Meta标签的Description属性 - Google_SEO帮助文档(三)
  4. 改进你的URL解构 - Google_SEO帮助文档(四)
  5. 让你的导航更加人性化 - Google_SEO帮助文档(五)
  6. 提供有质量的内容和服务 - Google_SEO帮助文档(六)
  7. 更好的写锚文本 - Google_SEO帮助文档(七)
  8. 适当地使用标题标记 - Google_SEO帮助文档(八)
  9. 组织你的图片 - Google_SEO帮助文档(九)
  10. 发挥robots.txt文件的作用 - Google_SEO帮助文档(十)
  11. 在链接中使用nofollow - Google_SEO帮助文档(十一)
  12. 使用正确的方式推广你的网站 - Google_SEO帮助文档(十二)
  13. 用好免费的WEB管理员工具 - Google_SEO帮助文档(十三)
  14. 充分利用网站分析工具 - Google_SEO帮助文档(十四)
  15. 对管理员有帮助的资源 - Google_SEO帮助文档(十五)



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