Webmasters who know a little bit about SEO all know that if a site has too many export links, it will have a certain impact on the site itself. However, there is no specific concept of how many export links are too many and how much impact they have. Moreover, there is no specific statement on which types of export links are allowed by search engines and which ones will be demoted.
Recently, when I was operating my website www.acedog.com, I used the site as a resource site. Due to improper operation of links, it was demoted by search engines. The keyword ranking dropped by several pages, and the snapshot update was slow for several days. Search engines have downgraded my site.
After ruling out several possibilities, the biggest possibility is that too many export links resulted in being punished. There is another possibility: linking to a punished site. Because the only way for many people to make external links is to comment, or comments are the main method. This method is indeed effective, but some sites have been punished for it. Using comments to make links is also very particular. The best way is to check other people's links and then follow them to comment.
After evaluating the previous number of exported links, I now control the number of links out of the page to less than 50. The next step is to observe the search engine's response.