A pool is a large, usually rectangular body of water that people use for swimming, relaxing, and playing games. Pools can be found in backyards, hotels, and public parks. They are often filled with clean water and may have features like slides, diving boards, and lights for nighttime swimming. Many people enjoy spending time in a pool during hot weather, as it provides a refreshing way to cool off. Some pools are designed for exercise, like lap swimming, while others are meant for fun and leisure. Families often gather at pools for barbecues and social events, making them a popular spot for summer activities.