404
Standard HTTP status: the requested page was not found
A 404 page is a service page shown to a visitor when the requested address cannot be found.
It appears when a page has been deleted or moved, a link is outdated or the URL contains a typo. A good 404 page does more than report an error: it helps the visitor keep going, to the home page, search, the catalogue, the blog or other important sections.
A well-designed 404 page reduces frustration, helps keep the visitor and supports the overall impression of the site even when something goes wrong.