Initiation forms can be used with a SharePoint workflow to pass additional information into the workflow from the user who starts it. SharePoint Designer 2013 offers a wizard-driven interface for creating parameters and generating the Initiation form. The form that SharePoint Designer creates can be further customized with Microsoft InfoPath.
One drawback to using Initiation form parameters is that they work only if the workflow is manually started on an item. If a workflow is set to automatically start when an item is modified or created, then there is no opportunity for the user to interact with the Initiation form. The following shows the workflow settings and configuration tab in SharePoint designer with the Start Options and Initiation form outlined:
The following walk-through will show you how to add an Initiation parameter to the Workflow Demo-WF created in the previous walk-throughs in this lesson.