Create, test, and personalize Hydrogen storefronts and shopping pages—with a growth stack that's designed for fast-moving brands. Pack makes it easy to stage, edit, and publish content without relying on developers for every change. Pack's growth stack includes a CMS and Hydrogen customizer that are as easy to use as a Shopify theme, plus built-in A/B testing, flexible Hydrogen themes, a page builder, and extensive developer tooling.