The GPS vehicle tracking systems are used on the internet in order to follow the vehicle that the devices are attached to. You can go on the website and see in real time using maps exactly where the car and person is that you are tracking. You can also get aerial views of the location that the vehicle is at. These systems also allow you to get text messages on your cell phone along with email messages. These notifications allows you to know when ever the subject devices moves and where they are moving to. This type of vehicle tracking is an excellent way to quietly watch or locate someone.