* - If you generate your CSR for www.yourdomain.com, it will not be valid for subdomains such as secure.yourdomain.com. If you want your SSL Certificate to be valid for a subdomain, enter the subdomain in the Common Name field. If you want an SSL Certificate to be valid for all subdomains, it must be a Wildcard SSL Certificate, and the common name field must begin with an asterisk - e.g. *.yourdomain.com
** - if you are creating your CSR as an individual, fill the Organization field with the certificate requester’s name and the Organizational Unit field with the Doing Business As name.