Within a minute of cleansing or a simple water wash, while your skin is still moist, start with Step 1 Toner. Using a cotton pad (or just hands), in gentle short strokes, moving up and out, cover your face & neck with toner.
Immediately move on to Step 2 Serum by applying 1-2 pumps of serum to face & neck and pat gently for optimal absorption.
Finish with moisturizer and sunscreen. Always use sunscreen as part of your daytime skincare routine, in particular, AHAs can increase sun sensitivity.
For guidance on how to build a multi-step skincare routine, read this.