I was doing research on facelifts because I am interested in having the procedure. I found the phrase SMAS, what does it mean? How does it pertain to a facelift?

SMAS refers to a layer beneath the skin of the face known as the superficial muscular aponeurotic system. I perform a modified deep plane facelfit and use the SMAS, which is a tougher, thicker layer of tissue that I use in facelift surgery to achieve a lasting, natural appearance.