This document provides an overview of business process modeling notation (BPMN). BPMN is a standardized way to visually depict business processes. The document defines key BPMN concepts like events, activities, gateways, flows, swimlanes, and pools. It also provides examples of simple BPMN diagrams and how they can be used to represent basic business processes like ordering a pizza. The document aims to introduce readers to the basic notation and concepts of BPMN at a high level.