"Contactless" refers to technology that allows transactions or data exchanges without physical contact between devices. This is commonly seen in payment systems, where users can simply tap their credit cards or smartphones on a reader to complete a purchase. This method enhances convenience and speeds up the checkout process. In addition to payments, contactless technology is also used in public transportation systems, where riders can use contactless cards or mobile apps to access services. This reduces the need for cash or physical tickets, promoting a more efficient and hygienic way to travel.