Here is how to use the JUMISO All Day Vitamin VC-IP 1.0 Elasticity Serum, as advice from your team, in French, and without superfluous sentences:
On clean, dry skin, apply a few drops of the serum morning and/or evening on the face and neck, then gently massage until fully absorbed. Then use your usual moisturizer. Remember to apply sunscreen in the morning to protect the skin.