In simple terms, Non Fungible Tokens or NFTs are tokens that are unique. Each NFT token will have a unique identification code and metadata that distinguishes it from other NFT tokens. Non-fungible tokens are one-of-a-kind. On the other hand, digital currencies like Bitcoin would be considered fungible, as you can trade it for another bitcoin and still have the same thing. To lear more - What exactly in NFT or Non fungible token?