A histogram is a type of bar graph that visually represents the distribution of numerical data. It displays the frequency of data points within specified ranges, known as bins. Each bar's height indicates how many data points fall within that range, making it easy to see patterns, trends, and the overall shape of the data distribution. Histograms are commonly used in statistics and data analysis to summarize large datasets. They help identify the central tendency, variability, and skewness of the data. By analyzing a histogram, one can quickly understand the underlying characteristics of the dataset, such as whether it is normally distributed or has outliers.