A wildcard SSL certificate is a digital security certificate that secures a main domain and all its subdomains with a single certificate. For example, if you have a primary domain like 'certificatemanager.net', a wildcard certificate allows you to secure '*.certificatemanager.net', which would cover 'www.certificatemanager.net', 'blog.certificatemanager.net', 'shop.certificatemanager.net', and any other subdomains under 'certificatemanager.net'.
There are several compelling reasons for customers to consider purchasing a wildcard certificate: