For businesses with unique or complex requirements, Shopify provides options for advanced development. This includes building custom Shopify apps using the Shopify API, integrating with external systems like Enterprise Resource Planning (ERP) or Customer Relationship Management (CRM) software, and developing headless commerce solutions. Headless Shopify separates the front-end presentation layer from the back-end e-commerce engine, offering ultimate flexibility in design and user experience, and allowing businesses to serve content to various channels beyond a traditional website, such as mobile apps or IoT devices.