The CSR (short for Certificate Signing Request) is an encrypted text body for the certificate registration request.
A CSR code can contain various information that are integrated into the SSL certificate, such as the domain name (also called common name) and the name and address of the person or company that wishes to have the certificate issued. A correct CSR code is required for the Certificate Authority to issue a certificate. If you are not sure whether your CSR is incorrect or incomplete, you can check it here.
If you have not ordered a certificate for your CSR yet, you can do so under the following link: SSL Certificates