ZkRollups and Optimistic Rollups are Layer 2 scaling solutions for Ethereum that can significantly reduce gas fees and increase transaction throughput. ZkRollups use zero-knowledge proofs to bundle multiple transactions into a single transaction on the main Ethereum chain, reducing the amount of gas required per transaction. This allows for more transactions to be processed in a single block and reduces the overall load on the Ethereum network. Optimistic Rollups, on the other hand, use a different approach by processing transactions off-chain and submitting a summary of those transactions to the main Ethereum chain. This significantly reduces the amount of gas required per transaction, as only the summary needs to be submitted to the main chain. This allows for faster and cheaper transactions while still maintaining the security and trustlessness of the Ethereum network. Both ZkRollups and Optimistic Rollups are promising solutions for reducing gas fees and increasing scalability on the Ethereum network. Read More:https://www.codezeros.com/blog/how-zkrollups-&-optimistic-rollups-can-reduce-gas-fees-on-ethereum