What is a Wildcard SSL Certificate?
Easy to manage and flexible, a secured Wildcard is a top choice for organizations managing multiple sites hosted across numerous subdomains.
With a DigiCert Wildcard, you can issue copies of your certificate on as many servers as you want, each of which is assigned its own private key. Add, change, or delete a SAN at any point during the lifecycle of the certificate for no extra charge.
A certificate configured for *.example.com, will secure www.example.com, as well as mail.example.com, blog.example.com, and others. The asterisk is used to serve as placeholder for all possible subdomains.