The OV-chipkaart is a contactless smart card used for public transportation in the Netherlands. It allows travelers to check in and out on trains, trams, buses, and metro services, making it a convenient option for both residents and visitors. The card can be loaded with credit and is valid across various transport operators. To use the OV-chipkaart, passengers simply tap the card on a card reader at the start and end of their journey. This system helps track travel costs and ensures that users are charged accurately for their trips. The card can be purchased at stations and online.