Like Cheap SSL certificates, Wildcard SSL Certificate secures you’re Web site URL and all of its sub-domains. The function of the Wildcard SSL Certificate are the same as a regular SSL certificate, undergoes the same validation processes, and is available as either a Turbo SSL or a High-Assurance certificate.
It is really useful than the cheap SSL certificates because some sub-domain also get registration forms of ask for personal information to submit online while shopping or booking the hotels or car online. It provides more security than the Cheap SSL certificates.