The PTZ stands for Pan, Tilt & Zoom PTZ Camerawhich is a feature of this type of camera to be able to view a large area and zoom into a view and in most cases an option can be setup to automatically scan and automatically tour and some more sophisticated features that automatically can follow a target which can be a person or an object such as an automobile by motion.  These type of features aid in today’s need for controlling human resource costs and provide proactive surveillance measures in alerting alarms of potential security incidents to help mitigate losses to persons or property.  

Demo on PTZ Pan Tilt Zoom Security Camera
Demo on PTZ 3D Zoom
Demo on PTZ Security Camera Presets & Paths
Demo of PTZ Patterns Features