A public key is a code used in encryption that is freely shared and known by everyone. It is used to ensure the security and authenticity of information by enabling encryption and decryption. Full definition
It is simply printing your private and public keys on a piece of paper and keeping it in a secure storage where only you can access. (coinstaker.com)
You will have Private Key as well as Public key printed on the paper and you need to store a copy of this data at different places. (coinfunda.com)
Paper wallets contain both private keys and public keys printed on paper, and you can store this information in a safe place so no external hacker will be able to get your coins. (captainaltcoin.com)