1、 Introduction to Deadchain
Dead link refers to the inevitable occurrence of obsolete, deleted or invalid web links in the process of website optimization, revision and management, which can be divided into the following forms:
1. Protocol deadlock: The http protocol returns a non 20x/30x error code, such as 404.
2. Content dead chain: page semantics clearly write that the content does not exist/the post has been deleted/the page is missing, etc.
3. Jump dead link: jump to the home page/error page, etc.
2、 Impact of dead chain
1. Impact on user experience: reduce users' and search engines' goodwill towards the site.
2. Impact on search weight: impact on crawler crawling efficiency, and reduce the probability of high-quality resources. A large number of dead link low-quality resources are included to reduce the evaluation of Baidu Search on the site.
3、 Baidu search dead link processing mechanism
1. Webmaster push: webmaster knows which pages have dead links, and the push efficiency is high.
2. Technical identification: detection lag, affect experience, and false identification.
4、 Suggestions on the style of dead chain
1. HTTP protocol code: It is recommended to return the HTTP status code as 404.
2. Page Content: The semantic meaning of the page title indicates that the page cannot be accessed. The semantic meaning of the page body indicates that the page cannot be accessed. It is not recommended to use Martian and pure pictures.
5、 Normal page style suggestions
1. HTTP status code: The HTTP status code returns 200/304, and the jump setting is 301/302.
2. Page content: the page title matches the page content, the text is illustrated (pure pictures are not recommended), and the layout is reasonable.
6、 Suggestions on site stability
1. Accessible to different networks: China Unicom/China Telecom/China Mobile.
2. Reasonable access carrying capacity and guaranteed access delay.
3. Blocking behavior: network devices such as firewalls block Baidu crawlers, with incorrect configuration. DNS services try to choose non competitor manufacturers to avoid blocking Baidu. Blocking of child chains, etc.
4. Avoid being maliciously parasitized: discover and deal with behaviors such as accessing logs in a timely manner.
7、 Other suggestions
1. Link active submission: especially when large-scale dead links occur.
2. Page change: the url is not reused to avoid irrelevant or accidental injury.
8、 Deadchain caused by improper HTTP/HTTPS settings
Some urls can only be accessed through HTTP, but HTTPS cannot
