How does the go_router package simplify handling deep links in a Flutter app compared to manually parsing incoming URLs yourself using Navigator 2.0's lower level APIs directly?

The go_router package provides a considerably higher level, declarative routing API built directly on top of Flutter's more complex and verbose lower level Navigator 2.0 APIs, letting you define your app's entire set of possible routes, including any dynamic path parameters, in one single centralized, easy to read place, and it automatically handles the underlying complexity of properly parsing an incoming deep link URL and correctly navigating to the exact matching defined route, significantly reducing the substantial amount of manual boilerplate code that would otherwise be required if you were to implement this same functionality entirely by hand.

final router = GoRouter(
  routes: [
    GoRoute(path: '/products/:id', builder: (context, state) {
      final id = state.pathParameters['id']!;
      return ProductScreen(productId: id);
    }),
  ],
);