Crypto Wallet is an app that transfers digital transactions or cryptocurrencies between participants in a blockchain network and triggers blockchain smart contracts. Its storage functions are the same as those of an e-wallet but apply to cryptocurrencies
NFT is a digital asset representing real-world objects such as art, music, in-game items, and videos. They are bought and sold on the Internet, and the exact mechanisms usually encode them as many cryptocurrencies.
ERC or Ethereum request for comment is a standard used to create and issue smart contract on the Ethereum blockchain. And 20 is the identification number of the offer.