NFTs are digital assets that can represent any digital file like artwork, memes or tweets. They are stored on blockchains which record proof of ownership. While NFTs have increased in value significantly with $11B in sales from June to September 2021, hidden fees for transactions can exceed their cost. The value of NFTs depends on what buyers are willing to pay and fluctuates with the market. Some benefits of NFTs include allowing creators to generate ongoing revenue, democratizing investment by enabling division of ownership, and using blockchain technology for secure authentication of ownership.