Wrapped Ether (WETH) is an ERC-20 token that represents Ether (ETH) on the Ethereum blockchain. It allows users to trade and use Ether in decentralized applications (dApps) that require ERC-20 tokens. WETH is created by depositing Ether into a smart contract, which then mints an equivalent amount of WETH tokens. This token is commonly used in decentralized exchanges and lending platforms on Ethereum.