This is an event type exclusively available on Android devices (not iPhones). It is a basic type of detection used when the device does not have a gyroscope sensor onboard.
Phone handling is a detection that the device has been handled (picked up etc.) during a drive. It cannot make the determination between passenger or driver.
This is an upgraded event type that requires a gyroscope sensor on the device.
Distracted driving is a detection that the phone is being handled on the driver's side of the vehicle during a drive.