Whether you are building external links to your website or exchanging friendly links, you will inevitably encounter a problem, and that is the nofollow tag. Nofollow literally means do not follow. It is an html tag value whose purpose is to tell search engines Spiders should not follow a specific link on the page.
Let’s first look at an example of how to write the nofollow tag, taking my blog as an example:
A normal A tag is as follows:
<a href=" http://www.xxx.com">xxx</a >
Now I add the nofollow tag as follows:
<a href=" http://www.xxx.com " rel="nofollow"> xxx</a>
This will successfully tell the spider not to follow this link. When you don't want to lose weight to an external link, but you have to have the link appear in the content, you can use this method to block it.
Next, I will share with you the true face of nofollow:
1. The Nofollow tag restricts spiders from crawling links. External links with nofollow tags have no weight transfer effect.
In order to avoid being weighted away by external links on the page, some websites set nofollow on the external links that appear on the page. Then such links will have no weight transfer effect. If there is no link bait function (such as search questions) Question), then we should decisively stop the release of external links there and let website managers play stand-alone, such as NetEase blog and Entrepreneurship Bar space.
2. The presence or absence of the Nofollow tag is one of the factors that must be examined when exchanging friendly links.
We all know that changing friendly links is not to get a little click traffic from the other party's website, but to increase the weight of the website. Some webmasters will add the nofollow tag to the friendly link part, causing the friendly link to lose its original meaning. Meaning, this kind of behavior is deceptive. Of course, some webmasters do not have the nofollow tag when exchanging friendly links with you. After a period of time, they secretly add the nofollow tag. To avoid this situation, you are required to wait for a while. Just carefully check the website with which you are exchanging friendly links. If this happens, you must decisively remove the other party's link immediately.
3. The Nofollow tag only prevents weight output and cannot avoid weight loss, but it can guide spiders to crawl.
For example, if there are 5 external links on your page, then the weight of each external link is 1/5, and you add a nofollow tag to one of the external links so that the spider does not crawl this link, then the remaining The weight of the four external links is still 1/5, and the weight of the page will still be distributed to these five links, but the weight of the link with the nofollow tag is lost and is not transferred. This seems to be It is a kind of behavior that "harms others but does not benefit oneself", but it is also beneficial. This can guide the crawling of spiders, allowing spiders with bandwidth limitations to crawl more pages in a limited time.
4. Nofollow and External nofollow
Literally, nofollow means "do not follow", while external nofollow means "external do not follow". Maybe you have already figured out that they both mean the same thing. External nofollow is just a more standardized way of writing nofollow. , don’t worry, they mean the same thing!
The Nofollow tag can also be used in many places, such as in the comment section of WordPress articles, as well as in some external links introduced for user experience, etc. Nofollow is a double-edged sword and takes some time to ponder. This article was originally created by Zhang Donglong, the director of the SEO learning website. The original address is http://www.zhangdonglong.com/archives/615. Please indicate when reprinting, thank you.
(Editor: Yang Yang) Personal space of the author Zhang Donglong