Mastercard introduced its sonic brand in 2019, creating a short melody intended to be recognised across stores, apps, and advertisements when a payment goes through. The checkout version heard here became familiar through point-of-sale terminals, online checkouts, and brand films, and it later spread on social media as creators reused the chime to mark purchases and wins. It remains popular because the two-note sound is instantly associated with a completed transaction, making it a quick audio shorthand for success in short-form video.