OpenSea, founded in 2017, is the world's first and largest decentralized NFT marketplace. It enables users to create, buy, sell, and trade a wide array of digital assets, including art, music, domain names, and virtual worlds. Supporting multiple blockchains like Ethereum and Polygon, OpenSea offers a user-friendly interface with features such as no-code minting and lazy minting, allowing creators to list NFTs without immediate gas fees. The platform charges a 2.5% fee on transactions and provides tools for personalized storefronts, fostering a vibrant community for creators and collectors alike