Text summary analysis of five invalid SEO outside the chain

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The construction of the chain is an important work that we need to do every day to optimize the staff. For the construction of the chain we can not like the cow to see where to send out the chain will be all the energy for hair outside the chain. To the outside chain some can play a very good optimization function, but some outside the chain but the effect is very little. In fact, the reasons for these outside the chain platform for the external chain of treatment, and some platform in order to prevent the spread of the chain, retain the weight of the site does not lose, the station outside the chain for the corresponding settings. And these processed outside the chain is often unable to pass the weight. In this paper, I share five kinds of external chains which cannot be transferred by weight.

One: Use JS code to jump outside the chain

Have a certain optimization experience people should clearly understand that the JS code for search engines is not friendly. The use of JS code jump outside the chain is generally not to pass the weight. Such an outside chain for our site optimization results very little. and the longest use of this JS jump outside the chain is a number of forums. As shown in the following illustration:

In the previous Figure Forum page We see we left a hyperlink, but don't be too happy, we look at the page code we can clearly see that the above hyperlink is using JS code to jump. This kind of outside chain does not have any effect to our search engine optimization, its function we can only say is increases our site the exposure rate.

Two: Jump links

Question and answer platform is the webmaster are particularly like the outside chain platform, because in the question and answer platform more easily get their own target customers. The question and answer platform in search and ask is also a high weight platform. The construction of the chain is not difficult, but the author thinks that the outside chain is a very typical jump link, it does not pass the weight, then we take the search as an example to see the chain. As shown in the following illustration:

In the above search and ask the chain, we also apply the Firefox debugging Plug-ins to see his page code, we found in the "href" is a search to ask itself the link address, and our address is just a jump link.

Three: links with nofollow tags

I think a lot of optimization people are aware of the role of this tag, that is to tell the search engine this label page is irrelevant to this, do not crawl. This label is a user advertisement. But some stationmaster puts this label in the Friendship link the section to achieve avoids the weight the output. As shown in the following figure. For the novice webmaster, in the exchange of friends chain must see clearly whether the link has a nofollow tag.

Four: Using a link to the IFRAME framework

As the author mentioned above the JS link, the IFRAME link on the framework is not conducive to search engine crawling, transfer weight. The search engine for this frame outside the chain will generally skip directly, and will not pass the weight of the site. The effect of this outer chain is also very low.

V: Using a robots file screen

The function of the robot file is to prevent the search engine for some pages or some of the pages under the directory crawling, and if our outside chain to do on this some pages will have no effect, because these pages have been blocked search engine spiders, how to transfer weight function. When we build the chain, we can look at the station's robot file to see if it has shielded spiders for the page. For this we can take the Discuz forum as an example, as shown in the following illustration:

From the above we can see that the Forum for user log page using a robots screen spider, that is, in this page of the outside chain for our site optimization can not take any role.

Through this article, I want to tell you that the chain we can not blindly do, selective do will be your outside the chain to achieve a multiplier effect. This article by the Suzhou website Construction http://www.buguwangluo.com/Original, reprint please reserve the address.