In general, it's important to maintain a sufficient level of antifreeze in your car's cooling system to protect it from freezing in cold weather and overheating in hot weather. Antifreeze also helps prevent corrosion and lubricates the water pump.
If you're unsure about the amount of antifreeze in your car, you can check the coolant level in the reservoir. The reservoir is typically located under the hood of your car, and it's usually marked with "coolant" or "antifreeze." The coolant level should be between the "full" and "add" marks on the reservoir. If the coolant level is low, you can add more antifreeze (or a mixture of antifreeze and water, depending on the specific requirements for your vehicle).