当使用 HTML 标签确定标题的重要性时，您实际上可以让搜索引擎机器人轻松确定您的网页的内容。搜索引擎不必猜测它。它可以准确地了解您的主要主题是什么，并将您置于适当的关键字下，以便您的潜在客户能够在 WWW 上找到您。
These indicate not only the size of the heading but also the importance.
The main headline will need an "h1" code to give it the greatest importance.
The main sub-headings, which are numbers one, two, and so on in the article outline deserve an "h2" showing they are next in line when it comes to importance.
The "h3" can be given to sub-headings under the main sub-headings such as "a,b,c" points in the article outline above.
SEO and Heading Tags
When the importance of a heading is established with HTML tags, you're actually making it easy for the search engine robots to determine what your web page is all about. The search engine doesn't have to guess at it. It can see exactly what your main topic is and place you under the appropriate keywords so your potential customers will be able to find you on the WWW.
Well there are dozens of factors which help you optimize your website or web-pages. Heading tags (h1, h2...) are just one of them, so if you truly want to optimize your web-pages, please make sure that web-page must comply with the below best & valuable ranking factors.
Unique Title relevant to the content of web-page
Snippets description which describe whole details in short of webpage
Unique & proper formatted content
Heading tag (H1) with the most relevant keyword to the webpage, try to place in upper portion of the page
Bold content which is more relevant & valuable within content
Firstly, SEO is a fairly unknowable subject - it's a continuous arms race between the search engines and the spam kings. There's a lot of folklore, a lot of hearsay, and a things change all the time.
By writing standards-compliant, semantic HTML, you make it easier for the search engine to interpret your content. This, in turn, allows it to decide if your content is relevant to a given search query. By saying "this is a heading" (i.e. using the h1 tag), you give Google a hint about the words in that tag - in this case, that it's probably the subject of the content.
SEO is mainly focussed on keywords in the document. The main priority is the title of the page. Then it is going to the heading tags (h1,h2,h3). Then the rest of the content (Google said they are not using meta tags, but it is better to have it also).
Using H1, H2, H3 etc in Webpage is giving preferences to the contents. Contents in H1 tags is more important than H2 tags like we do while preparing our documentation.
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这些不仅表明标题的大小，还表明重要性。
主标题需要一个“h1”代码来赋予其最大的重要性。
主要副标题（即文章大纲中的第一、第二等）应该有一个“h2”，表明它们在重要性方面排在第二位。
“h3”可以赋予主副标题下的副标题，例如上面文章大纲中的“a,b,c”点。
SEO 和标题标签
当使用 HTML 标签确定标题的重要性时，您实际上可以让搜索引擎机器人轻松确定您的网页的内容。搜索引擎不必猜测它。它可以准确地了解您的主要主题是什么，并将您置于适当的关键字下，以便您的潜在客户能够在 WWW 上找到您。
These indicate not only the size of the heading but also the importance.
The main headline will need an "h1" code to give it the greatest importance.
The main sub-headings, which are numbers one, two, and so on in the article outline deserve an "h2" showing they are next in line when it comes to importance.
The "h3" can be given to sub-headings under the main sub-headings such as "a,b,c" points in the article outline above.
SEO and Heading Tags
When the importance of a heading is established with HTML tags, you're actually making it easy for the search engine robots to determine what your web page is all about. The search engine doesn't have to guess at it. It can see exactly what your main topic is and place you under the appropriate keywords so your potential customers will be able to find you on the WWW.
有很多因素可以帮助您优化网站或网页。标题标签（h1、h2...）只是其中之一，因此如果您确实想优化您的网页，请确保网页必须符合以下最佳条件和标签：有价值的排名因素。
网页
将内容放在页面的上部
Well there are dozens of factors which help you optimize your website or web-pages. Heading tags (h1, h2...) are just one of them, so if you truly want to optimize your web-pages, please make sure that web-page must comply with the below best & valuable ranking factors.
webpage
to place in upper portion of the page
首先，搜索引擎优化是一个相当不为人知的主题——它是搜索引擎和垃圾邮件大王之间的一场持续的军备竞赛。有很多民间传说，很多道听途说，而且事情一直在变化。
话虽如此，Google 确实提供了一般性建议 - http ://www.google.com/support/webmasters/bin/answer.py?answer=35769&hl=zh-CN。
通过编写符合标准的语义 HTML，您可以使搜索引擎更轻松地解释您的内容。反过来，它可以决定您的内容是否与给定的搜索查询相关。通过说“这是一个标题”（即使用 h1 标签），您可以向 Google 提供有关该标签中的单词的提示 - 在这种情况下，它可能是内容的主题。
关于符合标准的 HMTL 的最佳资源是可能的 Zeldman 书 - http://www.zeldman.com/dwws/ 。
Firstly, SEO is a fairly unknowable subject - it's a continuous arms race between the search engines and the spam kings. There's a lot of folklore, a lot of hearsay, and a things change all the time.
Having said that, Google do give general advice - http://www.google.com/support/webmasters/bin/answer.py?answer=35769&hl=en.
By writing standards-compliant, semantic HTML, you make it easier for the search engine to interpret your content. This, in turn, allows it to decide if your content is relevant to a given search query. By saying "this is a heading" (i.e. using the h1 tag), you give Google a hint about the words in that tag - in this case, that it's probably the subject of the content.
The best resource on standards-compliant HMTL is the might Zeldman book - http://www.zeldman.com/dwws/.
SEO主要关注文档中的关键词。主要优先级是页面标题。然后它会转到标题标签（h1，h2，h3）。然后是其余的内容（谷歌表示他们没有使用元标签，但最好也有它）。
SEO is mainly focussed on keywords in the document. The main priority is the title of the page. Then it is going to the heading tags (h1,h2,h3). Then the rest of the content (Google said they are not using meta tags, but it is better to have it also).
在网页中使用H1、H2、H3等是对内容的偏好。 H1 标签中的内容比 H2 标签更重要，就像我们在准备文档时所做的那样。
您还可以访问
http://www.debojyotipal.com/h1-h2-h3- SEO 标签/
http://groups.google.com/a/googleproductforums.com/forum/#!category-topic/webmasters/crawling-indexing--ranking/5OROBdtsmPs
将提供更多见解。
Using H1, H2, H3 etc in Webpage is giving preferences to the contents. Contents in H1 tags is more important than H2 tags like we do while preparing our documentation.
Also you can visit
http://www.debojyotipal.com/h1-h2-h3-tags-for-seo/
http://groups.google.com/a/googleproductforums.com/forum/#!category-topic/webmasters/crawling-indexing--ranking/5OROBdtsmPs
which will provide more insights.