What does 'washer' mean in a car?

[DiMila]

washer appearing indicates a lack of windshield washer fluid, which needs to be replenished promptly. Below is an introduction to windshield washer fluid: Windshield washer fluid is a consumable in car usage: High-quality automotive windshield washer fluid is mainly composed of water, alcohol, ethylene glycol, corrosion inhibitors, and various surfactants. It can be classified by form into solid windshield washer fluid and liquid windshield washer fluid: most solid windshield washer fluids are used in environments above 0°C. During autumn and winter, windshield washer fluid should have excellent cleaning and antifreeze properties: Winter windshield washer fluid should be selected based on antifreeze performance, choosing a fluid with a freezing point at least 10°C below the local minimum temperature.