If you have an iPhone, the card will automatically download to Apple Wallet. Check the app for your new card (scroll through any cards that are already there as it may be hiding!).
On an android phone the default wallet app is GPay. Gpay is also compatible with iPhones. It should appear under Businesses, you may need to select More to view all cards.
You also have the option to download Wallet Passes from the Play Store prior to downloading the card.
The card may be labeled as Cuseum.