What is a Wildcard SSL Certificate?
Wildcard SSL allows you to secure an unlimited number of subdomains on a single certificate. It is a great solution for anyone who manages multiple sites or pages on the same domain. The one-time cost of the certificate also covers subdomains you add in the future.
A standard SSL certificate protects one specific domain name (e.g. www.example.com). A Wildcard SSL certificate (*.example.com) covers all subdomains at the same level.
Wildcard SSL is available as a DV certificate.