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#User
The "person" for whom you design and develop the product or service is called the user.
#404 error
A 404 error, also known as a 404 not found error, appears when a page on a website cannot be found. This usually occurs if the page has been removed or the URL has been entered incorrectly. It's a standard HTTP response code indicating that although the client was able to communicate with the server, the server could not find the requested page. 404 errors can be frustrating for users as they indicate that the desired information is not available, but they also assist in website maintenance by alerting web administrators to dead links on their site.
