A 0-level data flow diagram is a graphical representation of the flow and process of an e-commerce platform, showing the different roles and responsibilities between users, guests, and admins. This type of diagram provides an overview of the different parts that make up a system and the relations they have with each other. By providing a comprehensive explanation of the entire e-commerce process, 0-level data flow diagrams are essential in allowing users to better understand how their systems function. With EdrawMax, you can easily create similar data flow diagrams.