OpenSea is a marketplace for digital goods, including collectibles, gaming items, digital art, and other digital assets that are backed by a blockchain like Ethereum.
On OpenSea, you can buy, sell, and trade any of these items with anyone in the world. OpenSea is currently the largest general marketplace for user-owned digital goods, with the broadest set of categories (200 and growing), the most items (over 4 million), and the best prices for new categories of items.
OpenSea is also a decentralized marketplace. Trading on on OpenSea happens through a smart contract, meaning that no central authority ever holds custody of your items. Instead, users store items in their wallet of choice - whether that's a mobile wallet like Coinbase Walletor Opera Touch or an in-browser chrome extension like MetaMask.