1 The page has the nofollow tag, and this kind of link has no weight.
2. The other party’s website has cheated and has been punished by search engines or is about to be punished.
3. The other party does not link to you directly, but through a redirection, for example: using his own website www.y3web.com/ followed by link.asp?go=your website.com, or using an html page to jump to your website. , there are even methods that do not jump to your website, but directly embed your website into other pages using code. Please note that search engines do not think this is a link to your website.
4. The other party is "promiscuous" and has a lot of friendly links, and you are just one of them. If the other party has friendly links to 100 websites, then for the search engine, the voting weight he gives you is only 1/100.
5. A special friendly links page has been set up, which is full of friendly links. The effect is discounted.
6 Self-service links, especially those that do not require review, have zero effect. It needs to be reviewed, but it is not added manually by the webmaster, but appears automatically after passing the review. Please participate in the first article.
7. Check which websites the other party links to
8. When you open the other party's link page and view the source code, you cannot find your own website name and URL. Only js and other calls can be found.
9 Website content has nothing to do with your website. You are an education and examination website, but you ended up linking to a beauty website. useless.
10 The other party’s webpage is super huge, with more than 100K, which is comparable to Sina’s. You drag it again and again, and finally drag it to the bottom of the webpage. Finally, you can see your friendly links. Sorry, search engines can’t find it here.