Blockchains like Ethereum can only process about 15-30 transactions per second. Visa processes about 65,000. This fundamental limitation — known as the scalability problem — is the biggest barrier to mainstream adoption. Layer 2 (L2) solutions are the answer.
Layer 2s & Scaling: Making Blockchain Fast
Blockchain is secure but slow. Layer 2 solutions solve this by processing transactions off-chain and posting proofs back to the main network. This module explains how.