Key switches are the mechanisms found beneath the keys of a keyboard that register keystrokes. They come in various types, including mechanical, membrane, and scissor switches, each offering different tactile feedback and actuation force. Mechanical switches, for example, are popular among gamers and typists for their durability and distinct feel. The choice of key switch can significantly affect the typing experience. Mechanical switches are known for their longevity and responsiveness, while membrane switches are quieter and often found in budget keyboards. Understanding the differences helps users select a keyboard that best suits their needs and preferences.