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Hello. I can recommend you a good article where I learned more about what NFT is. Here https://blog.alphaguilty.io/ultimate-nft-guide-all-you-need-to-know-about-nft you will find a complete guide and answers to all popular questions. Including what a non-exchange token is, details about marketplaces, and even examples of NFTs. You will also be able to find a lot of other useful information on this topic and learn more about whether this is a good investment.