The same thing goes by three names and people search for all of them. A gift card, a gift certificate and a gift voucher are the same product: a prepaid balance someone buys for another person and redeems against your services later. Sold from your own site, the money arrives now, the work happens later, and nobody takes a cut of it. Sold through a marketplace or a booking app, a share of that prepayment is often theirs. If you run a salon, the same applies to selling gift cards at a salon, where prepaid balances are one of the few reliable ways to bring quiet weeks forward.