外链这一块相信很多从事优化工作的朋友都很重视，因为它是站点优化中不可或缺的一部分。而作为优化的新手，我们可能在刚开始都是只是在注重外链的数量上，而忽视外链的相关度问题，而恰巧外链的相关度确是一个很关键的因素。那么为什么呢?笔者将从SEO及UEO两个方向上分析为什么说外链的相关度很重要 The chain this piece of believes that many friends in optimizing job very seriously, because it is an integral part of site optimization. And as for the optimization of the novice, we may at first is just in the notice on the amount of the chain, and ignore the chain of correlation problem, and happened to the chain of correlation is indeed a very crucial factors. So why? The author SEO and UEO from two directions: why the chain said analysis of correlation is very important 一、从SEO角度分析(Analyzed from SEO) 随着SEO技术的普及与改进，出现了很多相当牛x的SEOer，这些SEOer可以在不同行业类型的站点发布外链，但是搜索引擎真的能够识别我们发的内容是什么，内容的质量好坏吗?或许搜索引擎可以判断一篇文章是否是原创，可以从该文章是否在网络上被大量重复，但是它却不能很好的识别此文章的质量高低，只能通过用户的行为去判断，因此当我们到一些不相关的站点论坛发布帖子建设外链时，那么外链的相关性方面肯定是做的很差的，比如我们做服装销售的站点的，到优化类型的站点发布外链，这样就完全偏离了我们站点主题;其实搜索引擎判断一篇文章是关于什么的，从关键词的密度中就可以识别，当一篇帖子跟站点的主题不相关，那么搜索引擎自热而然会调低这个链接所获得的权重值。 With the popularization and the improvement technology SEO, there are many quite cattle x SEOer, these SEOer can be on different types of the website publishing industry chain, but the search engine really able to identify what is the content of the we hair, the quality of content good or bad? Perhaps a search engine to judge an article is original, from the article is in the network by many repeat, but it's not very good recognition, this article quality high and low, only through the user behavior to judge, so when we are not related to the construction site BBS post the chain, then the correlation of the chain in the poor is certainly do, like we do clothing sales site, to optimize type of website publishing the chain, thus completely deviate from our site theme; In fact the search engine to judge a article is about what of, from the density of keywords can identify, as a son with the site's theme not related, so that a search engine from hot but downgrade the link for weights. 二、从UEO角度分析(From UEO Angle analysis) 如今搜索引擎现在越来越注重用户体验这一块，而作为我们优化人员也不能忽视UEO用户体验优化这一块。搜索引擎会根据用户的访问行为来分析一篇文章内容的价值，能够为用户提供好的服务、为用户解决遇到的需求问题的内容自然排名也是会比较靠前的，随着搜索引擎的不断更新，如今排名前几页的，一般都不再是垃圾的网站制作内容，下面笔者以seo是什么意思这个关键词为例，我们可以看到有机排名第一的站点(排除百度自身产品)： Now the search engine now pay more and more attention to the user experience the piece, and as we optimize their also cannot ignore UEO user experience to optimize the pieces. Search engines will be according to the user's access to the analysis of the behavior an article content of value, to provide users with good service for customers to solve, the demand of the content of the problems met in nature is also will be in front, as search engine update ceaselessly, now the top a few pages, general is not the content of the garbage, the following author to seo is what mean the key words, for example, we can see the number one organic site (excluding baidu their products) : 我们发现seo是什么意思这个关键词的竞争很大，但是为何技术领域的站点会排在第一呢，我们分析其内容，发现这个站点的内容很好的诠释了seo这个名词的意义，从而解决了用户的需求。 We found that seo is the key words what the competition is very big, but why technology site will row in the first place, we analyze the content, find this site and content is very good interprets the seo the meaning of the term, so as to solve the needs of the users. 对于我们的外链，我们可以说搜索引擎也是通过用户的行为来判断外链的质量的，比如我们网站是关于服装销售的行业的，如果你把信息发在汽车销售的行业论坛中，即使你的内容子再好，用户也不会去深入了解，因为用户在汽车论坛中主要就是为了获得汽车的相关信息，你的信息并不能获得青睐，自然搜索引擎不可能给予高的权重。 The chain for us, we can say that the search engine is through the user behavior to judge the quality of the chain, such as our site is about clothing sales industry, if you put the information is sent in car sales industry BBS, even if your content son again good, the user will not go to further understand, because users in the automobile BBS mainly is to get car of relevant information, the information you are unable to obtain favour, natural search engine can't give high weight. 站点的优化总是脱离不了外链的支撑，虽然相关度该的站点外链质量不论是SEO还是UEO角度上看质量都更加的高，但是毕竟资源有限，能给我们发布链的站点也并不多，因此我们在注重外链相关性的同时，还要注重多元化，多