404the role of the page

1to avoid dead links

Website Settings404after the page, if the website appears dead links, search engine spiders crawling these URLs get the status of “404”status response, knowing that the URL has expired, it will no longer index the web page and will feedback to the data center to delete the web page represented by the URL from the index database. Avoid affecting the website's inclusion due to dead links.

2to improve user experience

404pages are usually for users who have accessed non-existent or deleted pages on the website, and the server returns404Error pages, inform the browser that the requested page does not exist or the link is incorrect, and guide users to use other pages on the website instead of closing the window and leaving, eliminating the user's frustration.

3to avoid a decrease in trust

Search engines identify the status of web pages through HTTP status codes. When a search engine receives a broken link, the website should return404status code, telling the search engine to give up indexing this link. And if the return200 or302status code, the search engine will create an index for this link, leading to a large number of different links pointing to the same web content. As a result, the search engine's trust in the website is greatly reduced. Many websites have this problem:404the page returns200 or302status code instead of404status code.

4to avoid punishment

Some websites due to some incorrect server configurations, resulting in the return of200 status code or302Status codes, although these status codes do not affect users visiting the website, they may mislead search engines and make search engines think that this page is a valid page, thus crawling it. If404Too many pages can lead to a large number of duplicate pages, which may be penalized by search engines for cheating.