WETH, or Wrapped Ether, is an ERC-20 token that represents Ethereum (ETH) on blockchain in a 1:1 ratio. It was created to solve the issue of ETH not being natively compatible with the ERC-20 standard, which is widely used in decentralized finance (DeFi) applications.Key features of WETH include:Tokenization: WETH tokenizes ETH, making it compatible with DeFi protocols and smart contracts.Interoperability: It allows users to trade ETH on decentralized exchanges (DEXs) that require ERC-20 tokens.Value equivalence: 1 WETH is always equal to 1 ETH, maintained through a smart contract system.Wrapping process: Users can convert ETH to WETH by sending ETH to a smart contract, which then mints an equivalent amount of WETH.Unwrapping: WETH can be converted back to ETH by sending it to the smart contract, which burns the WETH and releases the equivalent ETH.