Knowledge is something that you get when you learn and understand something. It can be something you can practice like riding a bike, or it can be something you know in your head like knowing the capital of the United States is Washington, DC. It can also be thinking about how things work and being able to explain them, like understanding how a light bulb gives off light. With knowledge, you can make better decisions about everyday things. Whenever you want to do something, you first use the knowledge you already have to decide if it is the best choice or not.