For example, pushing the lever forward causes the helicopter to move forward. As a result, the entire rotor is tilted down towards the heliopter nose. This causes the lift vector to tilt forward creating a thrust component that moves the helicopter forward. Similarly, pulling the stick back moves the helicopter backward, moving it left moves the helicopter to the left, and so on. However, your question relates to yaw control , or the ability of a helicopter to turn left or right.
Most helicopters accomplish yaw control using the small tail rotor.
By changing the pitch of the tail rotor's blades, this rotor will produce a side force that turns the helicopter nose left or right. They do so using the cyclic. If a helicopter has two rotors, it can tilt one as if to move to the left and another as if to move to the right, but the combined effect causes the helicopter to spin while hovering over the same spot. As you may know, yaw is the ability of a vehicle to rotate from left to right. Since that time, we have received several more questions regarding how helicopters without tail rotors maintain yaw control.