# Dymension Testnet Guide

By [geohookah](https://paragraph.com/@geohookah) · 2023-02-18

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Greetings, everyone! I’ll guide you through the testnet as simply as possible in this article.

**Dymension** is a network of easily deployable and lightning fast app-chains, called RollApps. All of which are serviced by the Dymension Hub. **The Dymension Hub** is a PoS blockchain that is the center of the Dymension network of modular blockchains (RollApps). It is the decentralized source of truth, security, connectivity, and liquidity for the network of RollApps.

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*Originally published on [geohookah](https://paragraph.com/@geohookah/dymension-testnet-guide)*