What is the Cardholder on a debit card?

It is a visa gift card and it has a large text on the front that says “Vanilla gift” on it.
i’m trying to pay for a membership for a month and i don’t know if i’m putting the right name in. wheni tried skipping, it told me to put one in.

YOU are the cardholder if it is your card.
It’s a prepaid gift card that you can use anywhere that visa is accepted.