Forget the old-fashioned, highly astringent toners of yesteryear. Modern formulations play a valuable conditioning role, and help to keep your skin soft and smooth. Different types of toners are designed to do different things. Some exfoliate, some hydrate, and some are antibacterial and/or anti-inflammatory. But in general terms, a toner should balance the skin after cleansing, and help to prep it for the application and absorption of subsequent topical products.