It's just a terminology thing, so not terribly important, but these types of cards are called "store cards" or "retail cards", and they are usually considered to be credit cards, despite having some differences from regular credit cards.

This card seems to allow you carry a balance from one month to the next, so that means it isn't a "charge card" which must be paid in full every month: https://en.wikipedia.org/wiki/Charge_card