Nowadays people use Credit Card more than Debit Card. Because there is an extra time of about one month to pay the money.

Add-on cards are supplementary cards linked to the primary credit card and can be issued to the primary cardholder’s ...

An emergency credit card can help with unexpected expenses, but make a plan to pay it off quickly to avoid interest charges.

For some, that won't be possible. If you fly Alaska Airlines with another person at least once a year, this card is a must-have. Be aware, however, that Alaska doesn't fly everywhere.