An application admin is a role that grants full access to an application and its tables, scripts, and other components1. An application admin can create, modify, and delete any element of the application, as well as publish and install it2. An application typically has an application admin role that is automatically created and assigned to the application creator3.
Reference = 1: Application administration - ServiceNow Docs 2: Application admin role - ServiceNow Docs 3: Application roles - ServiceNow Docs

"Guided Application Creator is enabled via the Guided Application Creator (com.glide.sn-guided-app-creator) plugin, which is active by default in the Now Platform." Located under "Activation Information" section at this URL:
https://docs.servicenow.com/en-US/bundle/tokyo-application-development/page/build/guided-app-creator/conce

ServiceNow provides several methods for developers to publish and share applications once they are ready for distribution. The supported methods include:
* Publish to an application repository: This method allows developers to publish their applications to a centralized repository, enabling easy distribution and installation across multiple ServiceNow instances.
The application repository serves as a hub where applications can be stored and accessed by other instances. snowunderground.com Publish to an application repository: This method allows developers to publish their applications to a centralized repository, enabling easy distribution and installation across multiple ServiceNow instances.
The application repository serves as a hub where applications can be stored and accessed by other instances. snowunderground.com
* Publish to the ServiceNow Store: Developers can submit their applications to the ServiceNow Store, a marketplace where applications are reviewed, certified, and made available to all ServiceNow customers. Publishing to the Store involves a certification process to ensure the application meets ServiceNow's standards. support.servicenow.com Publish to the ServiceNow Store: Developers can submit their applications to the ServiceNow Store, a marketplace where applications are reviewed, certified, and made available to all ServiceNow customers. Publishing to the Store involves a certification process to ensure the application meets ServiceNow's standards. support.servicenow.com
* Publish to an update set: An update set is a container for capturing configuration changes in ServiceNow. Developers can publish applications to an update set, which can then be moved between instances, allowing for the transfer of application configurations and customizations. servicenow.com Publish to an update set: An update set is a container for capturing configuration changes in ServiceNow. Developers can publish applications to an update set, which can then be moved between instances, allowing for the transfer of application configurations and customizations. servicenow.com Options A (Publish to a spreadsheet), D (Publish to a local USB device), and F (Publish to a local drive) are not supported methods for publishing applications in ServiceNow. These options do not align with the platform's mechanisms for application distribution and deployment.