SEO actual Combat Analysis: graphic interpretation of the five outside the chain misunderstanding

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Many webmaster friends in doing SEO, every day to the Web site hair outside the chain and find links, but the results are very little, the site has been optimized for several months, still in situ. To this end, the small series on the outside of the chain to do five mistakes, for novice webmaster reference.

A, contains JS code hyperlinks.

Most webmasters know that the search engine on the JS code is not friendly, but there are some novice webmaster do not understand how the hyperlinks inside the JS code. The figures for the small series are as follows:

From the above figure we can see the outside of the chain of Code contains JS code, and when we move the mouse over the hyperlink above, the browser's lower left corner is not the display point of the URL, but a JS code. Therefore, this chain can not be regarded as an anchor text, the most is to increase the website site exposure rate, and small series that the weight of this link does not have a plain text link to bring the effect of large.

Second, jump links.

Many webmaster often to search and ask to do outside the chain, in Baidu with domain instructions A search is included, even by seconds, very happy ah way: Hey, brother and made a high quality outside the chain! In fact, more than search, many forums also use jump links to prevent others to send out the chain, here we search for an example to ask. The following figure:

We can see from the code that the address behind the href is a search-and-ask address, click to jump to the target site. Also put the mouse over the chain, the bottom left corner of the browser as a link to ask. Look at the following words, I wish you happy!

Third, the link contains nofollow tags.

The meaning of the Nofollow label is to tell the search engine "do not track links on this page" or "do not track this particular link." Some webmaster in Do friendship link, the label is entrained with Rel= "nofollow" to avoid weight export, this is equivalent to the other side of the site one-way to this site to do a one-way outside the chain. And for Baidu, the site's home page weight is generally the highest, the benefits are self-evident. We hereby follow the following drawings to facilitate the identification of novice webmaster.

Four, the Friendship Link module uses frame framework structure.

And JS code similar, frame and IFRAME framework structure is also not conducive to search engine crawling. Search Engine crawler found this frame structure is usually direct pass, if in the middle of the outside chain is no effect.

Five, robots.txt rule limit.

When the robots.txt rules limit the search engine crawler, not allowed to crawl some of the specified pages, in these pages do outside the chain is generally ineffective. It should be explained that the search engines that do not follow the rules of the robots are accidental, such as Taobao rules, but still have. To view a Web site's robots rules we can open the site root directory of the robots.txt file for viewing, to find out which also pages do useful, which pages do outside the chain does not effect. The following figure:

From the above figure can be seen, DZ robots.txt inside prohibited search engine crawl log page, that is, in DZ's log inside the outside chain is no effect.

The above for small compilation of five kinds of outside the chain misunderstanding, I hope the novice webmaster will help, do not blindly to do outside the chain, perhaps you do outside the chain is one of these even a variety!

This article by Changsha SEO webmaster Joint voting software http://www.toupiaow.com jointly released, reprint please keep the link, the niche is not very grateful, thank you!