I still do seo well, I believe du Niang will understand. However, when I recently used external links for my website, I found many problems during the link check, which are still some bad cases. I wrote this article today to remind other webmasters of the same situation. Nofollow is the most known invalid external link code. In addition to nofollow, there are other code that is also heartless.
I. Javascript: void (0) hacker trick;
All know that classification information stations have high weights. Although only bare chains can be left, there are not many websites with high weights and links. Besides, the external chains of classification information stations can also be extended. Three offline links of classified information are sent every day, and all posts can be instantly received. At that time, when looking for external chain resources, transient access was the primary criterion, but the link itself was ignored. Today, I took the time to check the link and found that Javascript: void (0) was added to the code of an information website. Although it is a clickable link, however, if the js code search engine is set, it will not be crawled. In Javascript, void is an operator that specifies to calculate an expression but does not return a value. When I searched the internet, I found many webmasters asking, because some people added this when they were doing friend chains. This is too embarrassing. This station does not cooperate. Pay attention to the external link with people. If the code is included in the link provided by the other party, the link is invalid. Although you can see with the naked eye that the other party has made a link for you, it makes no sense.
2. t. asp? Or link. php? False handle;
The xizui Hutong is well-known. Many webmasters have done external links in this community before. I launched external links in Xizang last year, but I found that these links are basically not included. Just last month, I found that the external chain of Xisi had a good record, so I also tried it. I posted several posts in a forum of Xisi, and the record was timely. However, the source file is depressing. First, there is no post text in the source file, and the link is added with t. asp ?. This is a good discovery. You can see it by hovering your mouse over the link. It's strange that I'm too happy to notice it.
Added with t. asp? Code
Another form is the log published on Yibang, which is added with link. php? Code, which can be clearly found when you move your mouse over the link. Although this link is added to Yibang's article, if your article is recommended to the forum, this article is an external link. To be recommended, we need to rely on the quality of the article.
Personal code is relatively white, but connections similar to the above are invalid, and you do not need to release external links on these sites in the future. It was also white-haired, and Baidu considered cheating. Links are natural and normal for a long time. They cannot be links of the link factory or javascript jump or asp jump. These links are useless at all. There are also links sent to forums and blogs in a group. Because the content is similar, it has nothing to do with the content of the article, so it will be identified and there is no value.
When Baidu knew it last week, the link was left with one, which was especially confusing. When I checked this week, I found that all the answers with links were deleted. The level-4 account is useless. When answering the question, the link is directly passed. Who knows that the answer was deleted. After reading the external links left by others, they all succeeded by using strange characters. Although the link left in this way is an effective external link, the user experience is very poor. People who often pay attention to robin and zac may find that they are always emphasizing the search and user experience.