Toners remove traces of make-up, dirt and cleanser residue on the skin and are designed to be used after regular cleansing. They also can minimize the appearance of pores in the same way that moisturizers do. There is some debate, however, on whether they actually do more harm than good.
Only people with very oily skin see any benefit from toners, according to Dr. Jeffrey Dover of Yale University School of Medicine, cited by About.com Style. Although toners are less drying than they were in the past, those with dry skin may find that toners aggravate that condition, particularly in the case of toners that contain alcohol. Most dermatologists agree that a simple cleanser is all that's required for most people.