A non-fungible token (NFT) is a cryptocurrency token that is indivisible and unique. One NFT cannot be interchanged with another NFT, and the whole cannot be broken down into smaller parts and used. NFTs offer myriad options for creating and trading digital assets — such as original artwork and blockchain-integrated collectible game items. They act as a non-duplicable digital certificate of ownership for any assigned digital asset.
NFTs are useful for proving the scarcity and provenance of rare assets, both digital and real-world. Once the code is written, it is then minted, or permanently published, into a token. Non-fungible tokens are mainly built on Ethereum using the ERC-721 token standard, which the ZORA protocol extends.