If you want to buy something online, we usually have an online market. If you want to buy a phone, laptop, or tab, go to a store or market right. As that NFTs, we have an NFT market. The best market for NFT is opensea.io, rarible.com, And mintable.app. Today, we will talk about opensea.io and give you a working example of how to do it. The method is almost the same for rarible and mintable.