Not Reaching Full RPM's with Stepper Motor and Arduino Uno

Projects Programming
6 
void setup() 
{  
    stepper1.setMaxSpeed(200.0);
    stepper1.setAcceleration(100.0);
    stepper1.moveTo(24);
 }

So with this following code, setMaxSpeed is my steps/sec while the setAcceleration is my steps/s^2. What exactly is the moveTo function? The number of steps?