A cryptocurrency wallet is a digital tool or application that allows users to securely store, send, and receive cryptocurrencies such as Bitcoin or Ethereum. Unlike traditional wallets that hold physical currency, a cryptocurrency wallet stores cryptographic keys - private and public - that are essential for accessing and managing digital assets on a blockchain. Wallets can be software-based (online, desktop, or mobile apps) or hardware devices, and they provide users with the means to authorize transactions, monitor balances, and interact safely with the cryptocurrency ecosystem. Proper management of wallet security is crucial to prevent unauthorized access and loss of funds.