You'll need to choose ways to market your NFT artwork in the next part of the shape. There are actually a few opportunities. 'Set price tag' allows you choose a value and promote your NFT right away (just like eBay's 'Purchase it now' selection). The tutorial assumes you've some familiarity https://nftonopensea14397.wizzardsblog.com/18501100/about-nft-on-opensea