Often terms like voucher, gift card, coupon, promo code (etc) are used interchangeably, and with a little ambiguity. 

Our brief definition: vouchers confer the purchaser with the right to receive goods and/or services from the voucher issuer (the Partner you purchased the voucher from, not Steppr), up to their face value, until expiry. For a more comprehensive explanation, please refer to our User Terms & Conditions.