The Myki Card is a smart card used for public transport in Melbourne, Australia. It allows users to travel on trains, trams, and buses by simply tapping the card on a reader when boarding and alighting. The card can be loaded with money or travel passes, making it convenient for both occasional and regular commuters. To obtain a Myki Card, users can purchase one at various locations, including train stations and retail outlets. The card can be topped up online or at designated machines. It is an essential tool for navigating the city's public transport system efficiently.