A Voronoi diagram is a way to divide a space into regions based on the distance to a specific set of points, called seeds or sites. Each region contains all the locations that are closer to one seed than to any other. This creates a visual representation of how space is allocated around these points, which can be useful in various fields like geography, urban planning, and computer graphics. Voronoi diagrams can help solve problems such as optimizing the placement of facilities, like hospitals or schools, by ensuring they are accessible to the maximum number of people. They also appear in nature, such as in the patterns of cells or the distribution of plants in an ecosystem.