nofollow means

nofollow is the attribute value of an HTML tag. nofollow tells search engines not to follow links on this page or not to follow this specific link. As long as the link with the nofollow tag is added, the crawler will not crawl it.

nofollow is the attribute value of an HTML tag. Its appearance provides a way for webmasters to tell search engines "Do not follow links on this page" or "Do not follow this specific link." The meaning of this tag is to tell search engines that this link has not been edited by the author himself. , so this link is not a vote of confidence.

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The concept of nofollow was originally proposed by Google in 2005 , the explanation that this tag was proposed at that time was mainly to deal with the increasingly widespread cheating of external link mass posting, which means that as long as the link with this nofollow tag is added, the crawler will not crawl it.

What is the impact of adding nofllow?

Normally, backlinks will transfer weight, so in order to add backlinks, some SEO people publish a large number of irrelevant links in forums and blogs. The content of the link. The existence of these spam links causes a certain degree of trouble for search engines to evaluate the quality of web pages.

Therefore, in this case, nofollow is exactly what several major search engines (such as Google, An attribute introduced by Yahoo, Baidu, etc.) in order to deal with spam links (Spam). At present, most blogs and website building systems have added the nofollow attribute to off-site links. In other words, leaving links on other people's blogs to The practice of obtaining PR value is usually in vain, especially the blogs of celebrities, which basically use the nofollow tag.

However, it is worth explaining that adding the nofollow attribute tag to the website does not mean that the search engine will not include it. That link is just not counted as a backlink. In fact, it can achieve the purpose of attracting spiders to crawl your website, but it cannot transfer any weight to your website. If you are also worried about your website being invaded by spam links, the nofollow attribute is a Very good "spam link firewall".

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