What Is The Purpose Of The 'Moro Reflex'?

Factual Questions
1

As I understand it, human infants typically display what’s called a ‘Moro reflex’, whereby they quickly flail their arms outward, with their palms up, when their heads are dropped backward.

What does this reflex accomplish? How did this trait evolve??

Thanks.

2

Seems obvious, the way apes carry their young clinging to their chests. Don’t let go !!

Some people have this when they are falling asleep, they jerk awake with a feeling of falling.