Apple Pay launched in 2014 as Apple's contactless payment service for iPhone and Apple Watch, and its short confirmation chime quickly became familiar wherever tap-to-pay was accepted. As more shops, apps and transit systems adopted the service, the sound moved from tills and phones into online videos, where creators began using it as shorthand for a completed payment. It remains popular because listeners recognise it instantly, associate it with speed and security, and understand the moment without any caption or explanation.