SEO 200 Secrets: nofollow label definition and use

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Google Webmaster Center has an article on the rel= "nofollow" label help, you can see.

2005 Google pioneered the introduction of a code to prevent spam, and began to support the link to the "nofollow" attribute ("rel= ' nofollow '"). This is the SEO (Search engine Optimization) in the world a controversy over the hot news events. After all, "nofollow" attributes stripped of the value of the link, and the link to the impact of SEO is huge.

Definition of nofollow Label:

Initially, the nofollow attribute appears in the page-level meta tag, indicating that the search engine does not track (that is, crawl) all outbound links on the page. For example:. This statement will nofollow all links to the page.

Later, Google put this label attributes separately, added to the independent link above, for example: SEO Institute, said to tell the search engine "do not track the link on this page" or "Do Not track this (SEO Institute) specific links." Google does not track links with nofollow, where PageRank or positioning text is not transmitted by Google.

Second, nofollow label is really useful?

Wikipedia now adds a "nofollow" attribute to all of the external links, and the reason for this is to fight spam links like those of Black hat seo. The changes have taken effect.

The correct use of nofollow tags to shielding the search engine spammers have a great effect. A link as long as the nofollow attribute is added, then no matter what the operation, will not be Google and other search engines give a higher weight. Links using the nofollow tag are strictly not really external links, at least not an effective external link that works on SEO. Of course, it's only for search engines that support this label. Google,yahoo,msn expressed support for the label, which Baidu does not currently support.

Chinese search market more than half is Baidu's world, as long as Baidu does not support this link attribute, nofollow can not really popular. Spam links are still very useful in Baidu, so the spam message will never stop because of nofollow.

However, it is necessary to note that nofollow link Baidu will still crawl, so even if the link is added to this tag, still help to improve the collection of Baidu or even ranking. And even for Google, where the nofollow tag is placed, Google will still index some of the linked content.

According to the solitary heroes of the observation, added the nofollow attribute, Google is really going to put the weight of zero is still open to discuss. I think the link added to this attribute should not be considered "trusted", and the effect should be that the link is "irrelevant" to the site owner. For example, an entertainment blog Link SEO Institute, this link added nofollow label, Google should understand it, for this entertainment blog, SEO Research institute this link because the theme is inconsistent, is irrelevant.

Iii. What is the need to use the Nofollow label and the role of using this label?

1, the rubbish link may consider uses the nofollow label. For example, some blog programs inside the user comments or message information, as well as some forum posts inside the link in this category of the most spam links appear. By nofollow This kind of link, can also effectively prevent their own site is implicated in punishment. For example, when you are writing an article and have to refer to a spam site, such as you are preparing to expose a spam site, obviously you will not be willing to send the weight of their site to it, this time the use of nofollow is more appropriate.

2. Links for paid links or advertising content classes can be considered for use with nofollow tags. The site's ranking in Google's search results is partly dependent on the analysis of other sites linked to the site. To prevent paid links from affecting search results and adversely affecting users, Google advises webmasters to use nofollow on such links.

3, the secondary level of the link can use the nofollow label to balance the whole station link weight transfer. In other words, a site's internal links can also use the nofollow tag to control the internal link weight and PR flow and distribution purposes. For example, some contact us, privacy policy, copyright statement, such as links, the flow of the weight of these pages is often wasted.

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