Apple reviewers can refuse your app if they do not understand why your app requires some permissions. While the default messages on the modal will fit most of the apps, you may want to change it to fit more specifically in your app.
You can change those messages in the editor > Settings > Advanced:
For example, if your app is using geolocated push notifications, then, in the field “NSLocationAlwasAndWhenInUseUsageDescription“, you may add: “Location is required to get specific geolocated push notes.”.