The Publish section allow you to put your App information: App Name, App Icon Name, App Keywords, App Description, contact email, Official website, App category.
You can select the price of your App or let it free.
You can check the Audio Background Play to enable music or audio to play in the background of your App.
You will add your App icon then and the screenshots of your app for mobile, iphone5 and iPad format.
You will add then your Splashscreen.
The Reservoir Apps Team.