A dependency graph is a visual representation that shows how different elements or tasks are related to one another. In this graph, nodes represent the elements, while directed edges (arrows) indicate dependencies, meaning one element relies on another to function or be completed. This is commonly used in project management, software development, and systems design. For example, in software development, a dependency graph can illustrate how various modules or libraries, such as React or Node.js, depend on each other. Understanding these relationships helps teams manage tasks efficiently, ensuring that all necessary components are in place before proceeding with a project.