Moisture levels refer to the amount of water present in a substance, such as soil, air, or food. In gardening, for example, understanding moisture levels is crucial for plant health. Too much moisture can lead to root rot, while too little can cause plants to wilt. In the atmosphere, moisture levels are often measured as humidity, which affects weather patterns and comfort levels. High humidity can make the air feel sticky and uncomfortable, while low humidity can lead to dry skin and respiratory issues. Monitoring moisture levels helps us maintain a healthy environment, whether indoors or outdoors.