Business Process Model and Notation (BPMN) is an official standard for process flow diagrams. It is used to visually represent business processes, activities, and events in a standardized way. BPMN is used to document and communicate the steps of a business process in a way that is easy to understand and can be shared among stakeholders. It is also used to help identify potential areas of improvement in the process. BPMN diagrams are composed of elements such as activities, gateways, events, and sequence flows. Activities are the tasks that are performed in a process, gateways are used to control the flow of the process, events are used to trigger activities, and sequence flows are used to show the order in which activities should be performed. By using BPMN, organizations can create process flow diagrams that are easier to understand and more efficient to manage. BPMN also helps to ensure that all stakeholders are on the same page when it comes to understanding the process and how it should be executed.