This is parent workflow or calling workflow meaning it calls another workflow. It's purpose is prepare input for child workflow, call it and receive back report which will then be saved as PDF file. This parent workflow creates multiple reports as Call Local Workflow (Row Based) node is within a loop. Looping is done based on Group column from Input data and for each group one report will be created. Data is sent as JSON and BLOB file is received back. Then column for report location and name is created. Finally PDF reports are written to output folder within workflow.