By default, web servers provide a generic, plain text message like "Not Found". Custom 404 pages are recommended to maintain brand consistency and guide users back to functional areas of a site. 404 Not Found - HTTP - MDN Web Docs - Mozilla
: A client-side error code (4xx class) signifying the server cannot locate a specific page or file. Code 404
: Clicking a link to a page that has been deleted or moved without a proper redirect. By default, web servers provide a generic, plain
: Changing a URL slug for optimization without updating existing links. Implementation & Customization web servers provide a generic
: Redirection errors or server malfunctions.