A non-fungible token (NFT) is a digital asset that represents ownership of a unique item or piece of content, such as artwork, music, videos, or virtual goods. Unlike cryptocurrencies, NFTs are not interchangeable, as each token has distinct metadata and value. They are stored on blockchain networks, most commonly Ethereum, and have gained prominence in digital art, gaming, and collectibles markets. NFTs are used to verify authenticity and provenance, making them significant in the evolving digital economy.