In simple harmonic motion, velocity varies sinusoidally with time and depends on position in a specific way.

Velocity as a Function of Time

A property of SHM is that the velocity will be a quarter period $(T/4)$ ahead of the displacement. We can observe this as a shift in the position function to the left by $T/4$. It is also scaled by $\omega$ so that it has a max amplitude $A_v=A\omega$.