A tripod is a stand with three legs that holds a camera.
Photographers and filmmakers use a tripod when they want the camera to be completely still, without the slightest bit of shaking that even the steadiest human hands might cause.
The actual word tripod comes from the Greek tripodos which translates to "three-legged stool," made up of tri, which means "three," plus podos, "foot."
The word tripod has been used to refer to anything with three legs including tables and stools.
HORIZONTAL PAN
VERTICAL PAN
MOUNT TILT