# Ethereum Rollups

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## 📜 **TL;DR:**

* 🚗 Rollups optimize Ethereum's performance by gathering transactions "off the main Ethereum highway" (Layer 1) and then officially process them on a "side road" **(Layer 2).**
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## 🌐 Overview

* Ethereum Rollups are a Layer-2 scaling solution designed to enhance the ***throughput and features*** of the Ethereum network.
* They operate by "rolling up," or bundling, multiple transactions off-chain and submitting them in batches to the Ethereum mainnet for data availability. By doing so, they significantly reduce congestion and gas fees while maintaining interoperability with Ethereum.
* Rollups can also add new protocol features that would be impossible directly on Ethereum (e.g., PoP security to inherit Bitcoin Finality and Hemi's hVM Bitcoin Interoperability system).