NFT stands for Non-Fungible Token, a digital token that is a type of cryptocurrency like bitcoin or ethereum. NFT is a unique digital token, most of which use the Ethereum blockchain to digitally record transactions. It is not a cryptocurrency like bitcoin or ether because they are fungible, they can be exchanged for another bitcoin or cash.
NFTs are digital goods that can be bought and sold using this blockchain technology. Cryptocurrencies that use a public digital transaction ledger called a blockchain are fungible. Ethereum is a cryptocurrency, just like Bitcoin or Dogecoin, but its blockchain also supports these NFTs, which store additional information that makes them work differently than, for example, ETH coins.