Firstly, you (rider) just climb on to the Electric Bicycles and get yourself comfortable. Start peddling slowly and you will soon realise that the motor has started giving you assistance. Now, you have two choices:
Keep peddling on and off as per convenience. The motor will assist you whenever required. This mode is called Pedelec mode. You activate the Throttle mode when you simply pull the throttle back similar to riding a scooter. In this mode the motor will work automatically and the rider can enjoy the breeze with minimalistic effort.