Flammability refers to the ability of a material to catch fire and burn when exposed to a heat source. Materials can be classified as flammable, combustible, or non-flammable based on their ignition points and how easily they ignite. Common flammable materials include gasoline, paper, and wood. Understanding flammability is important for safety in various environments, such as homes and workplaces. Proper storage and handling of flammable substances, like chemicals and fuels, can help prevent fires and ensure safety. Fire safety measures, including smoke detectors and fire extinguishers, are essential in managing flammability risks.