A wallet is required for Bitcoin users so they may keep their private and public keys.
Public keys contain information that may be shared with everyone whereas private keys \scontain encrypted information known only to one or both parties during the trans- \saction. A user of Bitcoin has a variety of wallet options to select from, including Web Wallets, Software Wallets, Hardware Wallets, and Mobile Phone Wallets. Every wallet kind has a different purpose and level of protection.