🌐 Ethereum and Layer 2
The Ethereum network is the most used for smart contracts, but also one of the most congested.
Layer 2 solutions were created to solve that problem.
⚡ What are they?
Solutions built on top of Ethereum that allow for processing more transactions at a lower cost, without compromising the security of the main network.
Examples:
Arbitrum and Optimism → use optimistic rollups.
zkSync and StarkNet → based on zero-knowledge proofs (zk-rollups).
💡 Why do they matter?
They scale Ethereum without sacrificing decentralization.
They enable DeFi applications and NFTs with accessible fees.
They are a key step towards the mass adoption of blockchain.
Ethereum remains the foundation, but the future of its growth lies in the layers we build on top.

