You need to open a video or a series of pictures that were shot when turning around the subject.
A very important point is that you must turn very slowly and that a very small displacement of the camera (between 1.5 and 3 feet is a maximum). During that displacement, you must shoot around 15 to 30 images maximum (1 to 2 seconds of video).
With Popims Animator, you even don't need travelling rails or a tripod, as the alignment is entirely automatic.