A hardware wallet is a physical device designed to securely store cryptocurrency private keys offline. Unlike software wallets, which are connected to the internet and can be vulnerable to hacking, hardware wallets provide an extra layer of security by keeping your keys isolated from online threats. They often resemble USB drives and require a secure PIN for access. These wallets support various cryptocurrencies, including Bitcoin, Ethereum, and many others. Users can easily manage their digital assets through a user-friendly interface, making transactions simple while ensuring that their private keys remain safe. Popular brands include Ledger and Trezor.