Either side of mouth
With the fingertips of one hand resting on the skin inside the “smile line,” use the fingertips of the other hand to spread the serum with upward strokes.
Under eyes
With fingers gently holding the skin near the inside corner of the eye, use the fingertips of the other hand to spread the serum under the eye with sweeping strokes.
Forehead
With fingers holding the skin between the eyebrows, use the four fingers of the other hand to spread the serum with upward strokes.