A pilot light is a small flame, symbolized by 👨‍✈️🔥, that is used in certain appliances and systems to ignite the main burner. It serves as a constant source of ignition, ensuring that the main burner can be easily and quickly lit whenever needed. The pilot light's steady flame provides a reliable and continuous spark, enabling smooth operation and functionality of various devices such as gas heaters, water heaters, and stoves.