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The importance of external links in SEO well-known, external links do a good job, SEO project effect played to 70% of the role. But the choice of what kind of external links, is fastidious. For example, most of the domestic sites like with the PR value of the site Exchange links, this is an obvious link exchange error. The PR value is not high not to change the phenomenon, in the domestic is very common phenomenon.
As a career in the industry for several years of professional SEO, I sometimes do not even know what the PR represents?
Does the PR value represent the number of links to the site?
The level of PR value does not represent the number of external links to the site. In recent times in the PR value update, there have been a lot of PR6-PR7 blog, think billion in the targeted selection of dozens of blog has done observation, whether from the quality of the chain or quantity, are not very good external links.
Does the PR value represent the link quality of the website?
On the link requirements of quality, is the vision of the long-term SEO. The level of PR value does not represent the quality of the link, a number of highly relevant sites, mutual links. May enhance the website the weight, the website rank, but not necessarily will enhance the website the PR value.
PR value is not true PR value
You now see the PR value of your site, not the latest PR value. The actual PR, not three months to update once, and such PR value is only Google internal view.
The same PR value of different sites weight
Most of the domestic web site PR value between 4, 5, 6, of which PR4 and PR5 mostly. To this PR5 as standard, an external link number within 5 sites, assuming that the PR value of the site =5. One relies on mass-linked means to expand the number of external links in 500 sites, assuming that the PR value of this site is also equal to 5.
Even if the PR value is equal, but the weight of the site is not equal, the quality of the site is not equal. Baidu's pr=7 is not equivalent to a PR7 of the blog outside the chain with Baidu is a level, the quality of the blog site is not equal to the Baidu site with a level.
With PR as the standard of link exchange, there is a possibility of being punished
There are many web sites, even portals. These sites in order to enhance the PR value simply, in the Web site piled up hundreds of outside the chain, and even links Page 1, Links page 2, Links Page Contest Exchange External links. Such websites have become a link factory.
Responsible for the friendship link of the Commissioner, need to have SEO knowledge
Most of the site's Friendship link Commissioner, do not understand SEO. They exchange the link standard is based on the PR value of the high and low, to apply for the exchange of links to the site also do not know how to check the overall quality of the site. Just to PR high and low as the standard, in their own site linked to a large number of cheating site, the results of their own site was punished, do not know why is punished.
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2.PageRank, page level url:http://www.seo.com.cn/seo-pagerank.html
Summary
The extension of external links is tricky, even the simplest exchange links are not easy. To PR value high and low for link exchange standards, so that the link, in fact, very fragile. Do not talk about link relevance, not to speak the quality of the link, only talk about the number, only concerned about PR, which is the characteristics of most of the site exchange.
The purpose of the exchange link should be to enhance the weight of the site through the relevance of links to enhance the site rankings, improve the spider's crawl frequency.
For the current PR algorithm, think billion even feel that Google will be based on the quality of your site content, to adjust the PR value of your site.
Author: Hangzhou SI billion Network Technology Co., Ltd.
Original load: http://www.seo.com.cn
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