An NFT (Non-Fungible Token) is a unique digital asset that represents ownership or proof of authenticity of a specific item, usually something digital like:
Art
Music
Videos
Virtual real estate
Game items
NFTs are stored on a blockchain (like Ethereum), which makes them tamper-proof and verifiable. The term non-fungible means that each token is unique and can't be exchanged on a one-to-one basis with another, unlike something fungible like a dollar or Bitcoin.
