Apple Pay is Apple's contactless payment system for iPhone and Apple Watch, and its success sound is the short chime heard when a payment is accepted at a terminal. As phone payments became routine, the sound became instantly recognisable, even to people who had never consciously noticed it. Short-form creators began lifting it for shopping, budgeting and luxury jokes, where a single ding could stand in for an entire transaction. It remains popular because it is short, clean and universally understood as payment confirmed.