These days, most credit card issuers don't allow people to own a card account jointly, even with a spouse. So if you want to share your account with a family member, adding them as an authorized user is usually the way to do it.
An authorized user receives their own card that's linked to your account, and they can use it to make purchases and access the card's perks. But as the primary cardholder, you are on the hook for paying the bills.
