The SSL certificate is a tool that confirms the reliability of a domain, and sometimes its owner. It is proof of the security of data encryption that is transmitted between the server and users. The Wildcard SSL certificate is a solution dedicated mainly to companies. It allows you to secure any number of subdomains in a given domain. Wildcard is easy to manage because it allows encrypting the transmission of multiple addresses. Encryption also covers each of the subdomains that are grouped under one IP address. Wildcard is also called a symbol used in string search procedures, which replaces a single character (local wildcard) or any number of characters (global wildcard). The wildcard character differs from system to system – Microsoft Windows, for example, uses the symbol “*”.