It's recommended to think of NFTs as any other tangible work in real life, such as books, paintings, records, etc. The problem we would encounter is the originality or seal of authenticity of these works. This is what non-fungible tokens are about, a seal of authenticity that is embedded in blockchains, creating blockchain.
Although the digital work is replicated, NFTs can protect the ownership and/or authorship of said art. This means that it is not, in fact, exclusive content, but rather the property of the user, which is verified with a certificate of authenticity of the work. To create your NFT, you can use one of the established platforms, most of which use Ether, a cryptocurrency belonging to Ethereum, in their transactions. The first step is to create an NFT platform, a wallet that is available for use with Ether, and a certain amount of Ether in your wallet.
OpenSea is considered the leading NFT marketplace, and it doesn't charge for storing tokens. Go to your profile icon, select Create in the top right corner. You can upload image files, videos, music files—really any digital content. Accepted formats include JPG, PNG, GIF, SVG, MP4, WEBM, MP3, WAV, OGG, GLB, and GLTF. Although the maximum file size is 100 MB, the platform recommends uploading files under 40 MB to speed up the upload process.
Next, you'll need to customize your NFT. Segment it into a collection, add ownership, levels, and content statistics. In this section, you'll need to define how many units of the item you can store. Alternatively, you can choose which blockchain you want to mint your NFT on. When you're done, press the create button and that's it.
Sell your NFT!