The Makeup and Beauty What is a Facial Serum – How to Apply, Use, and MoreThe Makeup and BeautyMay 3, 2021October 4, 2021 by The Makeup and BeautyMay 3, 2021October 4, 20210171 Think of a facial serum as a category of skincare, similar to a cleanser or moisturizer. The serums are...