Let’s start with the basics:
So, they’re non-fungible tokens. This basically means that they are part of the Ethereum Blockchain (the second-largest cryptocurrency in the world, after Bitcoin). The tokens represent the ownership of a unique item; according to the Ethereum website “they can only have one official owner at a time and they're secured by the Ethereum blockchain – no one can modify the record of ownership or copy/paste a new NFT into existence”. While the digital files can be infinitely reproducible (I just copied the same ghost that was sold for 3k), NFTs basically give you clout — the proof of ownership of the work lies with the buyer while the artist can retain copyrights. It’s like owning a fine art print vs. an original Picasso. Other cryptocurrencies have also started to implement their own versions of NFTs, such as the crypto TRON.
These NFTs can basically be anything, from a gif to a digital painting, to even a ‘signed’ tweet, which was the case for Jack Dorsey, the co-founder and CEO of Twitter, that attempted to sell his first ever tweet and its highest offer stood at $2.5 million on March 6th.