NFTs (Non-Fungible Tokens) are non-exchangeable tokens.
What is an NFT?
Non-Fungible Tokens (NFT) are a special type of token in the crypto world. The basis of individual tokens is a sequence/chain of characters that cannot be copied or exchanged. In contrast, coins such as Bitcoin or Ether are not.
Protected lenses of this kind are becoming increasingly popular in the cryptocurrency sector.3
Read the NFT basics here.