Water content is how much water is in something. Imagine you have a cup of juice and you add some more water to it. Now you have more water in the cup and the water content has increased. Sometimes things have a lot of water in them, like fruits and vegetables. Other times, things don't have any water at all, like toys or books. Water content is important because it can affect how healthy or good something is for you to eat or drink. If something has too much water, it might be too watery and not taste good. If something doesn't have enough water, it might be too dry and not good for your body. So, it's important to know about water content and pay attention to it when we eat and drink.