A non-fungible token is a non-interchangeable unit of data stored on a blockchain, a form of digital ledger, that can be sold and traded. 

NFTs are also going to create a future where patronage of the arts looks a lot different. Because blockchain transactions are direct, and not mediated through a third party, collectors and fans will be in a position to directly support their favorite artist or creator.

Essentially, NFTs are like physical collector's items, only digital. So instead of getting an actual oil painting to hang on the wall, the buyer gets a digital file instead. They also get exclusive ownership rights. That's right: NFTs can have only one owner at a time.