A paper wallet is a physical document that contains your cryptocurrency's private and public keys. It allows you to store your digital assets offline, making it less vulnerable to online hacks. Typically, a paper wallet is generated using a secure website or software, which creates a unique pair of keys that you can print out. To use a paper wallet, you simply transfer your cryptocurrency, such as Bitcoin or Ethereum, to the public key printed on the wallet. To access your funds, you need to import the private key into a digital wallet. This method is often considered a secure way to store cryptocurrencies long-term.