For some, I am used to get around.
I never even touch the ground.
Sometimes I fall and sometimes I float,
If I’m in the air, then take note.
What am I?
A boat. Boats are used to get around, they aren’t on the ground, but in the water. They rise and fall with the waves, and if they’re in the air, it may be due to rough seas and you should be careful.
Another possible answer is a blimp.