This UML Activity Diagram for Email Connection is a flowchart depicting the flow from one activity to the next. The activity can be described as a system operation. The primary goal of activity diagrams is to show the system's dynamic behavior. Instead of implementation, this UML diagram focuses on the execution and flow of a system's behavior. Activity diagrams are made up of actions that are applied to behavioral modeling technology. It is a behavior that can be broken down into one or more steps. Activities are nodes connected by edges in a network. Action nodes, control nodes, and object nodes can all exist.