This eCommerce website - UML diagram is used to design the project's structure and behavior. These UML Diagrams were used to visualize potential users, processes, activities, and event sequences in an e-commerce website. It aims to analyze, comprehend, and comprehend the project's requirements before developing it. The eCommerce website - UML diagram is part of the project documentation representing the overall E-Commerce Website. Each of these diagrams depicts a different visualization of the structures and behavior of an e-commerce website. That is, understanding how the system processes data and interacts with the intended users.