MetaMask is a free web and mobile cryptocurrency wallet
that allows users to store and swap cryptocurrencies and interact with the
Ethereum blockchain ecosystem.
It is one of the most widely used crypto applications for purchasing NFTs in the world.
OpenSea is a decentralized marketplace that allows
users to buy and sell NFTs. Opensea was founded in 2017.
The exchange initially began as a market for
CryptoKitties but has since expanded beyond collectibles.