Scaling Ethereum Beyond the Merge: Danksharding

Compared to sidechains, layer 2 rollups are considered by many developers to be the more secure way for Ethereum to scale. Rollups, like sidechains, take the stress off of Ethereum by executing transactions on a separate blockchain. Transactions are settled on the rollup chain, bundled up, and then posted to Ethereum. Unlike sidechains, rollups borrow their security from the Ethereum mainnet they use fancy cryptography and other methods (like a multi-day dispute period) to allow Ethereum mainnet nodes to confirm that transactions are legitimate.