When you have completed all steps to configure your app, plugins and layout you can build your app.
Select the build action for your app (green button)
Select debug or debug & store version. Follow any guidance on plugin version warnings
Select <Build> The build will start and a spinning wheel will be seen
When the build is complete select the download button for your app and choose the debug or store version
Download the apk / ipa file or use the QR code to load the app on a device