A Wildcard SSL Certificate secure your domain and unlimited sub-domains on a single certificate.therefore Wildcard certificates save more money. Likewise Wildcard certificates work the same way as a regular SSL Certificate, allowing you to secure the connection between your website and your customer’s Internet browser. By encrypting and securing any data that passes through this connection you help to prevent any data theft or hacking. However, if any data is stolen from this connection it’ll be impossible to decipher since it’s encrypted.