The function \( f(x) = \sin\left(x - \frac{\pi}{6}\right) \) represents a horizontal shift of the function \( \sin(x) \). The transformation inside the sine function indicates that the graph is shifted to the right by \( \frac{\pi}{6} \) units.
Therefore, the correct response is:
It shifts the graph of \( \sin(x) \) to the right by \( \frac{\pi}{6} \) units.