Pack automatically creates Product pages for all your Shopify products in order to make them accessible to the Customizer. You can view them by navigating to Products in the sidebar. By default, Product data is served directly through Shopify, and all core product data is made available including tags, metafields, etc. This product data can be extended by your team and there is additional data that can be added through Pack, such as Groups and Bundles.
All your product pages are automatically synced up every time you make changes to them in Shopify. You can also create groups and bundles.