How To Use A Face Serum?Table of ContentsSerum, Cream, Oil, Lotion, Or Gel MoisturizerFacial Serum Vs. Facial Moisturizer: What's The Difference?What's The Difference Between Serum And Cream?How To Use Serum For Face In Your Skincare Routine!How To Use Face Klapp SerumFace Serums Explained: What Are They & How To Use Them: 7 Reasons that You Need A