The application home pages are all the "application type" pages connected to this application that are not linked to any sitemap node. They are presented as the default pages when the user selects the application from the site home. If there are no such pages, the first node in the sitemap will be presented.
To review their list you need to:
Step 1: Navigate to the SDK Application
Step 2: Select from the Objects top menu -> Applications
Step 3: Open the application management screen by pressing on a the view button
Step 4: Click on the "Home Pages" tab menu