A data flow diagram for eCommerce is used to depict the overall data flow in an E-COMMERCE WEBSITE SYSTEM. The data flow diagram for eCommerce illustrates how the project will handle the included data. It comprises three illustrations, which are represented by DFD Levels. They will be addressed as we progress through the discussion. The Data Flow Diagram (DFD) depicts the data flow and transformations in an e-commerce website. The input, processing, and output represent and define the overall data flow diagram for an e-commerce website. The following charts complete the E-Commerce Website Data Flow Diagram (DFD). Each of these Levels discusses its roles in emphasizing the eCommerce website's work.