HTTP Status Codes
You are browsing some sites or testing your own web applications, and suddenly you receive a white screen with some error number ! No worries, if you are getting some error message means, your web server and web browser is helping you to resolve the issue with those error codes.
There are more than 30 HTTP error codes in total but you don’t need all of them. HTTP response status codes indicate whether a specific HTTP request has been successfully completed or not.