What is a 404 error?
A 404 error is a code that is sent to your web browser when you request a page, an image, or other file that is missing. You may have seen this error when surfing the web, as most websites have a 404 error page that is displayed when content is not available for some reason.
404 errors typically happen when a website owner has moved or removed a page.
It can also happen when someone types a link incorrectly.
Why does it matter?
If you own a website, you need to check your site for missing pages and keep your visitors engaged. A 404 error may keep them from getting the information they are looking for - or worse - have them leave your site altogether.