Rain barrels are containers designed to collect and store rainwater from rooftops through gutters and downspouts. They help conserve water by capturing runoff during rainstorms, which can then be used for watering gardens, lawns, and plants. This practice reduces the demand on municipal water supplies and can lower water bills. Using rain barrels also benefits the environment by reducing stormwater runoff, which can lead to erosion and water pollution. By collecting rainwater, homeowners can contribute to sustainable water management practices and support local ecosystems. Many communities encourage the use of rain barrels through educational programs and incentives.