This code demonstrates module support in Web Workers: 1) Workers can use ES modules when created with type: 'module', 2) This allows for modular organization of worker code, 3) Workers can import their own dependencies independently, 4) Module features like import/export work normally in the worker context, 5) This enables better code organization and reuse in worker scripts, 6) It allows sharing code between main thread and workers through modules, 7) This feature is crucial for building well-structured, multi-threaded web applications.