Many SSL certificates are issued to a single, fully qualified domain name. That means that if you want to secure both http://www.yourdomain.com and http://yourdomain.com you'd need to buy two separate certificates - and pay twice the price.
Our SSL certificates are different. As standard, they secure both versions of your domain name in a single SSL certificate. There's no need to pay extra. And because you only have to buy one certificate (not two), it could cut your SSL costs in half.