Why is it necessary to include NSMotionUsageDescription?

[anasboyka]

in the documentation, it is said the the configuration for ios as follows

     <string>Privacy - Photo Library Usage Description</string>
     <key>NSMotionUsageDescription</key>
     <string>Motion usage description</string>
     <key>NSPhotoLibraryAddUsageDescription</key>
     <string>NSPhotoLibraryAddUsageDescription</string>

but i dont understand why NSMotionUsageDescription is needed.. as per apple documentation, apple developer, the NSMotionUsageDescription used for

This key is required if your app uses APIs that access the device’s motion data, including CMSensorRecorder, CMPedometer, CMMotionActivityManager, and CMMovementDisorderManager. If you don’t include this key, your app will crash when it attempts to access motion data.

may i know if this package used any of the above?