The Wildcard SSL is issued by Thawte, which belongs to Symantec group.
This certificate allows you to secure the sensitive data transfer on your website and all the affiliated subdomains thanks to an encryption up to 256 bits.
Not subject to the Extended-Validation, this certificate is issued within 4 to 10 days delay. Thawte Wildcard SSL is provided with a security seal: the Secure By Thawte seal. It ensures the confidence of your users about your concerns in terms of security: a vector of increase of the click and conversion rate !