404 Error
A standard HTTP response code signaling that the requested page is unavailable on the server, often caused by broken links, moved content, or mistyped URLs.
A 404 error appears when a browser can't find the page it was told to load, sort of like the server's polite way of saying that the content no longer lives at that address. This can happen for many reasons, such as deleted pages, broken links, or typing mistakes in the URL. While it's a common and harmless message, too many 404 errors can frustrate users and hurt your search ranking. The best websites turn them into helpful opportunities by using custom 404 pages that offer navigation links or a bit of humour. A smartly handled 404 shows professionalism and keeps visitors engaged instead of lost.