Starts a workflow from a form or interactive page. The person kicking off the run fills in what's needed, and can hand the run off to someone else mid-stream.
What the architect sets up
The form people fill in to start a run
Guidance for how hand-offs to the next person should work
The form a person sees when they open the run link.The shareable link and its privacy setting, in the workflow's entry-points panel in the editor.
How it behaves in a run
This is an entry point: it's how runs of the workflow begin.