Earn rewards: Rewards are given for actions that help the network reach consensus. You'll get rewards for running software that properly batches transactions into new blocks and checks the work of other validators because that's what keeps the chain running securely.
Better security: The network gets stronger against attacks as more ETH is staked, as it then requires more ETH to control a majority of the network. To become a threat, you would need to hold the majority of validators, which means you'd need to control the majority of ETH in the system–that's a lot!
More sustainable: Stakers don't need to do energy-intensive proof-of-work computations to participate in securing the network meaning staking nodes can run on relatively modest hardware using very little energy.
