Fresheners are products designed to improve the smell of a space or item. They come in various forms, including sprays, gels, and plug-ins, and are often used in homes, cars, and offices. Fresheners typically contain fragrances that mask unpleasant odors and create a more pleasant environment. Many fresheners also include ingredients that can neutralize odors rather than just cover them up. Common types of fresheners include air fresheners, fabric fresheners, and even car fresheners. Popular brands like Febreze and Glade offer a wide range of scents to suit different preferences and needs.