A "Power Law" is a mathematical relationship where one quantity varies as a power of another. In simpler terms, if you plot the data on a graph, you will see that a small number of items have a large impact, while a large number of items have a small impact. This pattern is often seen in various fields, such as economics, social networks, and natural phenomena. For example, in city populations, a few cities have very large populations, while most cities are much smaller. This uneven distribution illustrates the power law, showing that a few entities dominate the overall landscape, which can be useful for understanding complex systems.