Some outside-chain resources that don't need to waste time

Absrtact: Now do the optimization of all know to update the content of the site and outside the chain, then we have to do every day outside the chain has not been careful to observe it, and some outside the chain seems to have been successful, but for our site is not a little effect, today

Now do the optimization are aware of every day to update the content of the site and outside the chain, then we have to do every day of the outside chain has not carefully to observe it, and some outside the chain seems to be done, but for our site is not a little effect, today to introduce you to the following several situations, I hope you will not waste time on these outside chain resources.

A, the link exists JS code

I believe we all know that Baidu for JS code is not friendly, I believe there are many new SEO for anchor text links inside contains the role of JS code. The following figure:

From the above we can see that we do in the chain has a section of JS code, when we move the mouse to the hyperlink on the time, he should show me to do the chain of URLs, and become a JS code, so the outside chain for us is no effect, do not pass the weight.

Second, link to jump

We should all go to search and ask if you have done outside the chain, believe that a lot of people say is very fast, a lot of people are basically going to do one or two every day, but do not know whether you have studied its code, his code is jump, simply do not pass weight to our website. Look at the picture:

Third, the link contains nofollow tags

Nofollow is the property value of an HTML tag. Its presence provides a way for webmasters to tell search engines not to track links on this page or to "do not track this particular link."　　The meaning of this label is to tell the search engine that the link is not trusted by the author, so this link is not a trust ticket. Simply put, if a page has a link to the B page, but a page to the link with the rel= "nofollow" annotation, then the search engine does not calculate a page into the Reverse Link b page. The search engine sees this tag and may reduce or completely cancel the voting weight of the link. Look at the following figure:

Four, 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 set the limit crawl

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 is our site to do outside the chain of time to pay attention to the place, send some time to look at the code, do not waste everyone's time, hoping to help everyone.