Checkout UI extensions let app developers build custom functionality that merchants can install at defined points in the checkout flow, including product information, shipping, payment, order summary, and Shop Pay. > Shopify Plus: >Checkout UI extensions for the information, shipping and payment step are available only to stores on a [Shopify Plus](https://www.shopify.com/plus) plan.| Shopify
Learn how you can get started building a custom storefront on Shopify.| Shopify
Learn how to set up analytics with Hydrogen and Oxygen, and transmit metrics events to Shopify analytics.| Shopify
Learn how to build AI agents that can search hundreds of millions of Shopify products, manage universal carts across multiple merchants, and deliver seamless checkout experiences using the Shopify Catalog MCP server and web components.| Shopify
Learn about how Shopify Functions work and the benefits of using Shopify Functions.| Shopify
Learn about Shopify APIs, libraries, and tools, and select the right option for your use case.| Shopify
