This guide shows the types of Layer 2 solutions (like rollups and sidechains) and how they help Ethereum work faster and cost less: https://hashtagweb3.com/guide-to-layer-2s
Hashtagweb3
A Guide to Ethereum Layer 2 Scaling Solutions | Hashtag Web3
Ethereum's high gas fees have been a major bottleneck. Layer 2 scaling solutions aim to solve this. This guide explores how they work and the key differences between them.