When you create a package, you create a bundled file that contains all of the files needed to run the app via the Genero Application Server (GAS) or on a mobile device. Once the package file is built, it can be deployed to the GAS or to a device for testing.
Genero Studio eases the packaging and deployment of your app for testing by enabling you to build your package from within your project. See Packaging, deploying, and distributing apps in the Genero Studio User Guide.