An Oyster card is a contactless smartcard used for travel on public transport in London. It can be used on the Underground, buses, trams, DLR, London Overground, and National Rail services within London. Oyster cards can be purchased at Underground and Overground stations, as well as at some National Rail stations. You can also order an Oyster card online.
There are a number of benefits to using an Oyster card. It is a convenient way to pay for travel, as you do not need to carry cash or buy tickets. It is also a cheaper way to travel, as you get a discount on fares when you use an Oyster card. Oyster cards can also be used to store travel passes, such as weekly or monthly passes.