A wildcard SSL certificate secures your main domain and all its first-level subdomains (e.g., *.yourdomain.com).

This means one certificate protects:

  • yourdomain.com
  • www.yourdomain.com
  • mail.yourdomain.com
  • shop.yourdomain.com

Wildcard certificates are ideal if you have multiple subdomains to secure without buying individual SSL certificates for each.