The primary purpose of a fire extinguisher is to put out or control small fires, preventing them from spreading and causing greater damage or injury. Fire extinguishers are essential safety devices found in homes, workplaces, and public areas, and they can be used on various types of fires, depending on their classification. Common types include water, foam, CO2, and dry chemical extinguishers, each designed for specific fire hazards like grease, electrical, or combustible materials. Proper training in using fire extinguishers enhances personal safety and promotes an effective emergency response, potentially saving lives and property in the event of a fire.