Going forward, developers will be able to respond to customer reviews on the App Store "in a way that is available for all customers to see." This will allow developers to address negative reviews for the first time ever, something that has long been a point of contention in the iOS and Mac App Stores.
Previously, developers have had no way to respond to issues that customers report via an app review, or to further converse with a customer that has been having trouble with an app.
Developers are also able to ask customers to provide App Store ratings and reviews while using an app, allowing developers to get immediate feedback without requiring a customer to switch over to the App Store.
Apps are currently able to ask for reviews and ratings during usage, but doing so requires the App Store app to be opened up, interrupting an app or gameplay experience.
The new App Store ratings and reviews changes will be available to developers when iOS 10.3 and macOS Sierra 10.12.4 are made available to the public.
Update: Apple also plans to limit the number of times developers can ask customers to write an App Store review for an app. Only three requests per year will be permitted.