When browsing the Internet, sometimes a page will appear blank and the message: "error 404" or "404 file not found" will be displayed. This code is a message indicating an error that is returned by an HTTP. This means that the requested page does not exist.
It is also possible that this code is used for something other than for its initial meaning, i.e. when one wants to censor a page. The first 4 indicates a bad address while the last 4 indicates the problem caused by the bad URL.
This page not found will therefore not be indexed by search engines. When a person has a website and there is a 404 error, it is strongly recommended to repair this error because Googlebot will delay the search results for the site and the frequency of visits.
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