Function of Smooth Muscles in the skin
Smooth muscle in the skin actually produces very little motion.  They are found in special places, such as the areolas of the nipple, the tunica dartos of the scrotum, and also around hair follicles.

Smooth muscles that surround hair follicles give you what is known as goosebumps - they contract all together, creating a bump in your skin around the hair follicle.  This can happen when you're cold, scared, or experiencing strong emotion.



Sources:


Skin Tissue Engineering and Regenerative Medicine, Justine Fenner, Richard A.F. Clark, 2016; Chapter 1