12 IMPORTANT HTTP STATUS CODES & THEIR MEANING

200: OK - status code indicates that the request has succeeded

201: CREATED - request has succeeded and a new resource has been created

204: NO CONTENT - server has fulfilled the request but does not need to return a response body

304: NOT MODIFIED - Indicates the client that the response has not been modified.

400: BAD REQUEST - The request could not be understood by the server due to incorrect syntax.

401: UNAUTHORIZED - the request requires user authentication information.

403: FORBIDDEN - client does not have access rights to the content.

404: NOT FOUND - The server cannot find the requested resource.

409: CONFLICT - request could not be completed due to a conflict with the current state of the resource.

500: INTERNAL SERVER ERROR - server encountered an unexpected condition which prevents it from fulfilling the request.

503: SERVICE UNAVAILABLE - The server is not ready to handle the request.

504: GATEWAY TIMEOUT - The server is acting as a gateway and cannot get a response in time for a request.

1xx: Informational - Communicates transfer protocol-level information.

2xx: Success - Indicates that the client's request was accepted successfully.

3xx: Redirection - Indicates that the client must take some additional action in order to complete their request.

4xx: Client Error - This category of error status codes points the finger at clients.

5xx: Server Error - The server takes responsibility for these error status codes.

Note: If you know other status code. Let me know in the comment section. Thanks,