Recently we received some questions about how Google uses (or more accurately, doesn't use) the "keywords" meta tag in ranking web search results. Suppose you have two website owners, Alice and Bob. Alice runs a company called AliceCo and Bob runs BobCo. One day while looking at Bob's site, Alice notices that Bob has copied some of the words that she uses in her "keywords" meta tag. Even more interesting, Bob has added the words "AliceCo" to his "keywords" meta tag. Should Alice be concerned?
At least for Google's web search results currently (September 2009), the answer is no. Google doesn't use the "keywords" meta tag in our web search ranking. This video explains more, or see the questions below.
Q: Does Google ever use the "keywords" meta tag in its web search ranking?
A: In a word, no. Google does sell a Google Search Appliance, and that product has the ability to match meta tags, which could include the keywords meta tag. But that's an enterprise search appliance that is completely separate from our main web search. Our web search (the well-known search at Google.com that hundreds of millions of people use each day) disregards keyword metatags completely. They simply don't have any effect in our search ranking at present.
Q: Why doesn't Google use the keywords meta tag?
A: About a decade ago, search engines judged pages only on the content of web pages, not any so-called "off-page" factors such as the links pointing to a web page. In those days, keyword meta tags quickly became an area where someone could stuff often-irrelevant keywords without typical visitors ever seeing those keywords. Because the keywords meta tag was so often abused, many years ago Google began disregarding the keywords meta tag.
Q: Does this mean that Google ignores all meta tags?
A: No, Google does support several other meta tags. This meta tags page documents more info on several meta tags that we do use. For example, we do sometimes use the "description" meta tag as the text for our search results snippets, as this screenshot shows:
Even though we sometimes use the description meta tag for the snippets we show, we still don't use the description meta tag in our ranking.
Q: Does this mean that Google will always ignore the keywords meta tag?
A: It's possible that Google could use this information in the future, but it's unlikely. Google has ignored the keywords meta tag for years and currently we see no need to change that policy.
Posted by Matt Cutts, Search Quality Team
翻译:
Google不会在网络排名中使用关键字元标记
最近,我们收到了一些关于Google如何使用(或更准确地说,不使用)“关键字”标签对网络搜索结果进行排名的问题。假设您有两个网站所有者,Alice和Bob。Alice经营一家名为AliceCo的公司,鲍勃经营着BobCo。有一天,在查看Bob的网站时,Alice注意到Bob已经复制了她在“关键字”标签中使用的一些单词。更有趣的是,Bob在他的“关键字”标签中添加了“AliceCo”字样。爱丽丝应该担心吗?
至少目前(2009年9月)谷歌的网络搜索结果,答案是否定的。Google不会在我们的网络搜索排名中使用“关键字”标签。此视频详细说明了解或查看以下问题。
(视频请自行搜索)
问:Google是否曾在其网络搜索排名中使用“关键字”标签?
答:总之,没有。Google确实销售Google Search Appliance,该产品可以匹配标签,其中可能包含关键字标签。但这是一个与我们的主要网络搜索完全分开的企业搜索设备。我们的网络搜索(Google.com上每天有数亿人使用的知名搜索)完全忽略了关键字标签。它们对我们目前的搜索排名没有任何影响。
问:为什么Google不使用关键字标签?
答:大约十年前,搜索引擎仅根据网页内容判断页面,而不是任何所谓的“离页”因素,例如指向网页的链接。在那些日子里,关键字标签迅速成为一个区域,在这个区域中,有些人可以填充经常无关的关键字,而没有典型的访 由于关键字标签经常被滥用,许多年前谷歌开始忽视关键字标签。
问:这是否意味着Google会忽略所有标签?
答:不,Google确实支持其他几个标签。此标签页面记录了我们使用的多个标签的更多信息。例如,我们有时会使用“description”标签作为搜索结果摘要的文本,尽管我们有时会对我们展示的代码段使用描述标签,但我们仍然不会在排名中使用描述标签。
问:这是否意味着Google将始终忽略关键字标签?
答:谷歌未来可能会使用这些信息,但这种可能性不大。Google多年来一直忽略关键字标签,目前我们认为无需更改该政策。
发布者:Matt Cutts,搜索质量小组
以上文章确定了,在谷歌搜索中,您不需要担心有没有写关键词标签,对网站seo搜索结果没有任何的影响。
在百度中,关键词对seo有没有帮助呢?
我们来看看另一位大神ZAC是怎么回答的。

原文:如果你说的是HTML代码中的关键词标签,那么不需要写,现在搜索引擎都忽略keyword标签。有的网站写了keyword标签,但经常堆积关键词,可能反倒有负面作用。所以我个人建议删除关键词标签。
OK,现在答案清晰了吧,谷歌官方跟ZAC都已经说了,关键词对于网站优化没有任何的帮助,甚至会起到负面作用,建议不要在页面中填写关键词了,甚至可以删除网页里面的关键词标签!
以上是风享互联对于网站优化需不需要写关键词的说明,希望对大家的网站优化有帮助,如有更多问题,请及时联系我们!