What is W-ETH?
Thanks to WETH to make autonomous trustless exchange feasible
ETH is the native currency built on the Ethereum blockchain.
Every decentralised application is built on the Ethereum blockchain implements it's own form of Token based on ERC-2o Standard.
A smart contract which will generate WETH equals to ETH you transfer to that contract to allow trading on autonomous trustless exchanges.
FYI : Mostly all the trustless exchanges works for ERC20 based tokens.