Analysis of the main causes of the decline in Baidu rankings

When the search engine algorithm changes or is enhanced, some keywords of some websites disappear, and some administrators say that their websites have disappeared. in fact, this is not the case. When the search engine algorithm changes or is enhanced, some pages may be lost, or some pages may be filtered and punished, rather than the whole website.
If all the pages of the website disappear (you can directly search for the URL of the website in google), it may be caused by the following reasons:
A. Your server cannot be accessed normally due to a fault at a critical time;
B .your website has the robots.txt problem;
C. Your website is removed from the index by the search engine due to improper optimization techniques;
If the keyword ranking of only a part of the page drops, or the keyword ranking of many pages is very poor. This may be:
A. Your improper behavior on the optimization method was discovered by the search engine;
B. The search engine algorithm has undergone major changes;
C. You have made some rules that violate the new search engine principles or are allowed before the algorithm is changed. Now it is a violation, so you will be punished accordingly;
The following are some detailed reasons:
1. From the very beginning: Has your server been inaccessible recently?
Failed access to the server is one of the most common causes of rankings decline. Therefore, you only need to manage your server without making any changes to your website, ensure normal access, especially at critical times;
2. Have you used the robot.txt file? If yes, have you recently modified it? As a result, some syntax errors have occurred, preventing search engines from indexing your website?
Inventory file. By default, the search engine will include your entire website.
3. Have you been constantly optimizing your website? Potential errors caused by internal modifications include:
A. Optimize a keyword too much, such as modifying the title, meta, and other tags.
B. the internal link structure, especially the changes in the link text. If you modify the link structure and link text for the purpose of optimization, no novel will fall into the filter trap, especially the misuse of keywords, the keyword density is too large.
4. Have you added a domain name redirection?
Sometimes the search engine is very resistant to redirection. If the redirection is for optimization, use 301 instead of 302. This is a very important tool if redirection is appropriate.
5. Do you have a certain number of meaningful links? Or is your connection policy "coming today, going tomorrow? If you use this policy, it may have a good effect. However, if you add too many links to your small website or too many links to the same URL. Then you are very likely to be punished by search engines. As the search engine algorithms are constantly improving, the previously applied things are no longer applicable today.