Step in routine: Can be used as Step 1 (Oil Cleanser) or the final step (Moisturizer/Sealant).
What comes before: As Cleanser: N/A. As Moisturizer: Cleanser, Toner, Serums.
What comes after: As Cleanser: Water-based cleanser, rest of your routine. As Moisturizer: N/A (final step at night).