An NFT (Non-Fungible Token) is a unique digital asset stored on a blockchain that proves ownership of a specific item, such as digital art, music, videos, or in-game items. Unlike cryptocurrencies like Bitcoin or Ethereum, which are interchangeable, each NFT is one-of-a-kind and cannot be replaced with something identical. NFTs are commonly bought and sold online, and their value depends on factors like rarity, creator, and demand.