This guide provides a comprehensive overview of the use case diagram, a visual representation of the interactions between users and a system. It explains the purpose of the diagram, the different elements that make up the diagram, and how to create a diagram. It also provides examples of how
From Wikipedia
A use case diagram is a graphical depiction of a user's possible interactions with a system. A use case diagram shows various use cases and different types of users the system has and will often be accompanied by other types of diagrams as well. The use cases are represented by either circles or ellipses. The actors are often shown as stick figures.