GeoTrust QuickSSL Premium SAN certificate protects the main domain for which it will be generated and up to 4 additional SAN subdomains (Subject Alternative Names). SAN SSL Certificates allow you to protect additional DNS names with a single SSL certificate. For example, with the QuickSSL Premium SSL SAN certificate you can protect: www.domain.com, mail.domain.com, shop.domain.com and domain.com – all with this single SSL certificate. Thanks to this, you save time and money by using only 1 SSL certificate while securing 4 additional subdomains. Additionally with certificate you will receive $500 000 vendor’s warranty and dynamic secure site seal.