"General Information" are all primarily version independent information of your app. While editing all information are automatically saved in AppManager ("auto save"). Once you have all information ready for deployment, simply click on the "Upload Data" button and all information will get uploaded to the store portal.
For iOS this includes the following properties and information, which you can directly change in AppManager:
Store Categories (Primary / Secondary / Sub categories if available)
App Review Information
For Android this includes the following properties and information, which you can directly change in AppManager: