Begin using our diagram software today to make your UML diagrams. UML stands for Unified Modeling Languages and it is used to help users visually represent how a system works. In a UML diagam, the actors/roles/actions etc are all clearly mapped out so that a layperson is able to understand how the entire system would function. UML is a common language/standard which is used when trying to model a system/software. Benefits of Using UML Diagrams - Great way to visualise how a system works - Easy for layperson to understand - Common terms and language which is understood by most project managers