Toner is the step after cleansing that adds light hydration and preps skin for serum and moisturiser. There are two main types today: hydrating, soothing toners (often with hyaluronic acid, centella or panthenol) that suit almost everyone, and acid toners with AHA or BHA for gentle exfoliation, best used a few times a week. Sensitive skin should choose alcohol-free, fragrance-free formulas. Pat it in with your hands instead of a cotton pad to save product and reduce friction. Toner is optional, but useful if your skin often feels dehydrated.