Movements of the sticks on RC airplane transmitters correspond to the different control surfaces available on that model. The transmitter sends signals to the receiver which tells the servos or actuators on the plane how to move the control surfaces.
Most RC airplanes have some kind of rudder and elevator control for turning, climbing, and descending. Ailerons are found on many hobby-grade models.
In place of moveable control surfaces, some types of RC airplanes may use multiple propellers and differential thrust for maneuvering. It doesn't provide the most realistic flying experience but can be easier to master for novice pilots and children.
