Mantle Staked Ether (METH) is a cryptocurrency that operates on the Ethereum blockchain. It allows users to stake their Ether (ETH) in order to earn rewards and secure the network. Staking involves locking up a certain amount of Ether to support the validation of transactions and create new blocks on the blockchain. METH holders can earn additional tokens as a reward for their participation in the staking process. It is important to note that investing in METH carries risks, as with any cryptocurrency, and individuals should conduct their own research before participating in staking activities.