An e-wallet is an online prepaid account that allows users to store money for future online purchases and payments. E-wallets offer advantages like ease of use, accessibility, flexibility, and safety compared to traditional wallets. However, they also pose disadvantages such as potential for easy duplication and limited acceptance. Common e-wallet platforms and providers include Google Wallet, Qpass, and digital wallets supported on Android, iOS, Windows, and Mac operating systems that utilize near-field communication technology. E-wallets are used around the world, with popular examples being Osaifu-Keitai in Japan and MyKad in Malaysia.