Non-fungible here means that the item cannot be replaced by anything else — it is unique. Here blockchain technology is used. NFTs create a digital non-fungible token for each unique piece of digital art or creative work, say a poem, a painting, a photo, a cartoon, a song etc. Such rendering makes it the original there is. All others are simply the copies of that original. These are NFTs and are there on Ethereum blockchain. Thus an NFT is simply a block on a blockchain that stores, additional computerised information about the block. It makes the initial token or block unique.

NFT certifies with a computer code that the work is owned by an entity or individual. As the popularity of the work increases, it provides an ability to sell the ownership of the original. Speculators favour NFTs whose popularity is likely to increase. NFTs will take sometime to be mainstream.