Paper Wallets are those crypto wallets whose private keys (or seed phrases) are written on a piece of paper.
A private key is a string of numbers, letters, or a combination of both used to operate your blockchain address. They are similar to bank account passwords.
In crypto, the Public Key refers to the long string of letters, numbers, and most times alphanumeric that is used to send crypto to a blockchain address.
The Dencun Upgrade was an Ethereum scalability solution that improved transaction speeds on its blockchain via a rollup feature called "blobs"