The online home for many Visa and Mastercard gift cards sold through GiftCardMall’s retail and online partners is the GiftCardMall MyGift portal. This web page acts as the system where you typically go to keep track of your card information. It allows holders to activate a new card, register your details in some cases, check your MyGift card balance, and review recent transactions and important terms. When you understand how giftcardmall mygift works, your card stops feeling like a mystery.