The Workflow is the core of any Project. It consists of three components, which are closely interconnected with each other:
Flow - The place for the File. Which carries the File through the entire work process to the final stage.
Phase - The specific stages of document processing, which each have their own purpose: editing, approval, signing, etc.
Step - This is the area where Project owners assign Collaborators for each specific action.
More information about Workflow, Phase, Flow, and Steps can be found on Introduction to Workflows page.