It is perhaps the most well-known standard code of the HTTP protocol, the one that identifies the resource not found, the page no longer present in the archive of the site, and for eCommerce sites is often a frequent problem when products go out of stock and promotions expire. We therefore focus today on the 404 error and strategies to avoid that the unavailability of items can compromise the SEO of the site.
What is the 404 error
From a technical point of view, the standard status code 404 represents, as we mentioned, an error of the HTTP protocol and, to be precise, a problem related to client factors (like all those that fall within the range “400”). Client errors usually occurs when the request made by the user is syntactically incorrect or cannot be satisfied, and in the case of error 404 the message that appears is “Page Not Found“.
When occurs the 404 error
The user stumbles upon an error code 404 when the client attempted to contact the server it hosts, but the server failed to successfully complete the request; generally, the problem arises when it was not possible to find the desired page (Urls typed incorrectly, product terminated and not replaced effectively, resource moved without proper redirection, as we said in the article about