30% applies to the purchase of any Giovanni’s gift card over the amount of $100 or more on a single card and cannot be combined with any other discount. And cannot be used with any third party delivery services. A few examples of the most common purchases:

$100 gift card @30% off is only $70 
$300 gift card @ 30% off is only $210
$500 gift card @ 30% off is only $350
$1,500 gift card @ 30% off is only $1,050