The changes give users more information about apps and help ensure legal compliance.
New App Content Descriptions
You can now use the following descriptions: Medical/Treatment Information, Gambling and Contests, and Unrestricted Web Access (for apps that permit navigating and viewing web pages, for example with an embedded browser).
Update to Territory-Specific Restrictions Based on Rating
Territory-specific restrictions in the Korea, Brazil, United Arab Emirates, and Saudi Arabia App Stores have changed. You can see the current rating and territory restrictions for your apps in Manage Your Apps on iTunes Connect.
New Rating System for the Brazil App Store
The Brazil App Store now issues a Brazil-specific rating for games to ensure compliance with local regulations. The Brazil-specific rating is automatically generated from your existing content description on iTunes Connect and will appear next to the existing rating information displayed on your app’s page in the App Store.
More details in the iTunes Connect Developer Guide linked below...