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# VIDEO: What is a ZK Rollup?
- URL: https://www.techloy.com/video-what-is-a-zk-rollup/
- Published: 2025-08-21T14:49:01.000Z
- Updated: 2025-08-21T14:49:01.000Z
- Description: In this explainer video, you will learn what a ZK rollup is, what it means for scaling, and how it compares to Optimistic rollup.
- Author: David Adubiina
- Tags: / Tech Guide, Videos, ZK Rollup, Ethereum, / Crypto, WhatIs

[Ethereum](https://www.techloy.com/tag/ethereum/)’s biggest challenge has always been scalability. High gas fees and slow confirmations make it tough for the network to handle millions of users at once. That’s where ZK-rollups come in. ZK-Rollups (or Zero-Knowledge Rollups) bundle thousands of transactions off-chain and verify them on Ethereum with a single proof. The result? Lower costs, faster speeds, and stronger privacy, all without weakening Ethereum’s security. In this video, we break down what ZK-Rollups are, how they work, and why they’re such a critical step in scaling Ethereum for the future.

**Video Script & Editing:* [**Kelechi Edeh*](https://www.techloy.com/author/kelechi/) *&* [**David Adubiina*](https://www.techloy.com/author/david) */ Techloy.com*