A non-fungible token (NFT) is a type of digital asset that represents ownership or proof of authenticity of a unique item or piece of content using blockchain technology. NFTs are indivisible and cannot be exchanged on a one-to-one basis like cryptocurrencies such as Bitcoin or Ethereum, hence the term "non-fungible." They have gained popularity in the art, gaming, and collectibles industries as a way to buy, sell, and trade digital assets securely and transparently.