How Do I Publish an App?
Until you publish your app and as long as the yellow Draft flag is visible at the top right of the screen within the app, any changes you have made to your app will not be visible to submitters.
To publish your app click on the Publish button at the top right of the page
If this is your first time publishing, more than likely you won't have any errors to correct, and you will see a screen similar to the picture below:
If you have previously published your app and are making changes to it, the Publish page will display a summary of changes you have made to this draft, and it will show any errors that need to be corrected.
Until all errors are resolved, you will be unable to publish your app.