The non-fungible token (NFTs) are stored on blockchain technology and traded with different cryptocurrencies like Bitcoin, Ethereum, and Dogecoin. Since these are digital products/things so there are several websites on which you can purchase NFTs.

The website which is allowed to trade NFTs is called a Marketplace. Typically there are online marketplace websites through which you can buy/sell your NFTs. You just need to connect your crypto wallet to the specific marketplace and start trading NFTs. Some examples of the popular marketplace are OpenSea, Rarible, Axie Marketplace, etc.