Non-fungible token (NFT) development is the process of creating digital assets that are unique and cannot be replaced by another identical asset. NFTs are built on blockchain technology and are typically used to represent digital art, collectibles, and other unique digital items. The development process involves creating the NFT using smart contract programming languages such as Solidity and then deploying it to a blockchain network such as Ethereum. The NFT can then be bought, sold, and traded on various NFT marketplaces.