Ethereum is secure and decentralized — but why does it still feel slow and expensive? In Part 9 of Harini’s Ethereum Series, we dive into Layer 2 scaling and uncover how rollups help Ethereum process transactions faster and cheaper without sacrificing security. Learn why Layer 2 exists, how Optimistic and ZK Rollups work, and how Ethereum’s rollup-centric future is shaping Web3 at scale. Ethereum isn’t slow — it’s scaling smart.