Vertical orientation reffers to photographs that are taller than they are wide.

"Vertical photographs are taken by tilting the camera sideways. Vertical framing reduces the room and gives intense focus on the subject. Vertical images attempt to imitate the brain's natural selective focus ability. Vertical images are best used

When the subject is vertical

When height need to be depicted

When depicting vertical motion of the subject

While depicting the gaze (look) of the object either up or down

Vertical images can be used to focus a viewer's attention

Portraits and single objects are usually taken in vertical frames as they be combined with either the rule of thirds or centering to intensify impact. This helps to focus the depth of the portrait and to superimpose the subject. "