Often I find myself in a situation where I would like to add some information for the “future me”. A few lines documentation about a node or the workflow, so I can for example later remember why I made certain choices, or what the purpose is of certain actions (also useful to avoid really long describing node titles).
The iOS Shortcuts app has a nice feature for this. You can add a “Comment” action to a workflow. A comment “action” does nothing when executing a shortcut. Its only purpose is to add explanatory text in between actions.
You can add notes to each node! To add a note to a node, click on the Settings tab. There you can see the Notes text field. If you want to show this note in the Editor, toggle the Display note in flow to true. This will then display the note in the Editor UI!