Shutter speed is the unit of measurement which determines how long shutter remains open as the picture is taken. The slower the shutter speed, the longer the exposure time. The shutter speed and aperture together control the total amount of light reaching the sensor. Zoom burst is a technique in photography. Using the technique involves zooming while the shutter is open with a relatively slow shutter speed, generally below 1/60th of a second.  Panning is very simple, just set shutter speed to a high setting 1/2000 of a second, hold your camera and pan along with moving subject.