What's the difference between an Axios error with a 500 status code and a 503 (Service Unavailable) status code during a GET request?

A 500 (Internal Server Error) indicates the server encountered an unexpected error while *trying* to process the request. A 503 (Service Unavailable) means the server is currently unable to handle the request, usually due to overload or maintenance. 503 is often temporary, while 500 suggests a problem with the server's code or configuration. Retry logic is more effective for 503 errors than 500 errors.