Analysis of common misconceptions about nofollow and its true meaning for SEO

First we need to understand the use of nofollow tags before we begin to enter the theme. I believe there are a lot of seoer for this label is not a lot of understanding. As shown in the following illustration:

　　

So what is the real meaning of this label? I think a lot of people with the original understanding of the author is the same, that the use of this tag we can control the weight of the site, you can prevent the chain under this tag to receive the weight, so you can be very good to retain the weight to give other links.

This concept has been deeply rooted in many seoer, and the author initially contacted him in an article about the use of links to deceive. But a recent article on Google's explanation of the nofollow label found its own point of view turned out to be wrong.

The nofollow label concept was originally proposed by Google in 05, when the official explanation for the label was to deal with the rampant junk-chain cheating, meaning that the link under the nofollow label Search engine spiders do not crawl. At present, when someone in the forum or blog mass of junk outside the chain, the program can be automatically generated with nofollow tag, and search engines as long as the discovery of these tags will not be crawling to these outside the chain, can be a good deal with the outside of the chain of garbage.

　So where do we go on the nofollow label error?

First, for example, add your site page A,PR value is 10, and on this page there are 10 links, then we average down, each link on the page theoretically can be obtained (10/10=1) 1. So if we use the nofollow tag for five links in these 10 links, that is, cut off the weight of five links to transfer, then theoretically existing pages on the five links can be the weight is: 10/5=2, but in fact, each link on the page to get the weight of 1, Nofollow tags do not control the transfer of weights. Specifically we can also look at the diagram below the sketch.

　　

Search engine is not stupid, it will not let you have the opportunity to control the weight through this label, the final control page ranking. Simply put, the nofollow tag does not pass to the corresponding link weight, but does not transfer the weight to another link.

　So in turn, what does the nofollow label really mean to our optimization?

Although nofollow can not control the weight, but for our site SEO role must be some. For example, our site generally unavoidably have a lot of customer service Help, registration, login, User agreement and so on SEO is not important, but can not ignore the page. To search engine point of view this some pages of little value, at the same time, if many of these pages, for your optimization is also a certain negative impact.

We also give an example, our forum on the "POST" button, each page basically has this button, if your site does not have the link on this button to use the nofollow tag to shield off, then will make the search engine in every page crawling to this link. This will reduce the search engine spider for the site's crawling efficiency. Especially for the new station has a greater impact.

Now the results have been obvious, if we use the nofollow tag can let search engines to reduce some of the value of the page crawl, reduce the search engine crawling time, improve the crawling efficiency of the site, which for some new stations or some information is very large site effect is obvious, Reasonable use of this tag will make our site on the search engine more friendly, so that our optimization is less than twice. This article by the Daily Bushen network http://www.bushen365.com handwriting Original, reprint please indicate the source.