Every day is constantly outside the chain of friends please be sure to read this article carefully, because this article will tell you how to make each of your own out of the chain will not be due to the problems mentioned in this article, and can not pass the weight of your site. The main reason for this happening is that now all walks of life, basically, as long as it is involved in the need for the website of enterprises, companies, and even individuals have a certain understanding of SEO knowledge, whether it is more or less understanding, at least know to reduce the export of links to protect the weight of their own site. This also leads to the vast majority of sites will be through a variety of technical means to deal with their own site links, so that these links can not be exported weights.
Here I would like to introduce some of the external chain will not export the form of weight:
Links that appear in the JS code
I believe that the knowledge of a certain SEO friends should know that the search engine after the crawl page will go through a step to remove noise, and in this step will be the page of all the JS code out. Therefore, the search engine for JS code is not included, so all appear in the JS code in the link, since the search engine will not be included, then naturally will not pass the weight.
Links in the IFRAME framework
This is actually the same as the previous JS code, are in the search engine denoising process is likely to be filtered out, so this point you need to pay attention.
Links with nofollow tags
Xiong Wei Blog feel at this point does not need to explain too much of it, this problem has been commonplace things, and then become meaningless, if you do not understand the Baidu "nofollow" will be able to understand.
be blocked by a file of robots
This situation appears very little, but not will not appear, so before you send out the chain it is necessary to look at the website of the robots file, to see which places are not being crawled by search engines, then you need to avoid these are not crawled out of the place to send out the chain.
Bean-Ding Library
Many people like to go to the library to publish the chain, because these libraries themselves are very high weight, so the construction of these places outside the chain is very valuable. But it is worth noting that the bean-Ding Library Display page Although you can click on the link, but do not know the careful friend has not found, beans Dingwenku is the document into the form of flash, and view the source code you can't find this outside the chain. In other words, although the link address exists in the snapshot, it does not actually pass the weight ... (in the following figure, there is no flash link in the source code)
For the moment I think of these five cannot pass the weight of the situation, do not know what you have to add, you can reply in the comments, gather the strength of everyone to avoid those who do not work hard ...
"Xiong Wei written on October 18, 2013 20:23 P.M., the article copyright belongs to the Catalogue Pavilion website directory all, reprint please specify the Source: http://www.muluge.com/ncseo/258.html"