NFT stands for non-fungible tokens. To understand tokens, it is necessary to understand in what environment they exist – in this case, in the blockchain.
To put it very simply, a blockchain is a database that is simultaneously stored on a huge number of computers. In the traditional model of the Internet, all devices are connected to centralized nodes (in the form of servers or Internet providers), while the blockchain works in a different way. It does not provide for any central nodes; in its system, all devices simultaneously store all the information published in the blockchain.