Zearn serves as a liquid staking protocol for the ZetaChain PoS (Proof of Stake) blockchain. It provides users with the ability to stake their ERC20 ZETA tokens on the ZetaChain mainnet and instantly receive a representation of their stake in the form of stZETA tokens, eliminating the need to maintain staking infrastructure. Users will earn staking rewards and retain control over their stZETA tokens.