A chart is a graphical representation of data. It is a way to visually display information, making it easier to understand and interpret. Charts can come in many forms, such as bar charts, line charts, pie charts, etc. Each type of chart is used to represent data in a unique way and helps to highlight specific patterns or trends within the data. By using a chart, you can quickly grasp the key information contained within the data and make informed decisions based on that information.