[AEM Components : Markdown Documentation as help documentation]
by Arun Patidar
The Granite UI widget fieldDescription property is used to add helpful tooltips to your dialog fields but in some cases, you might need to add details documentation about the component, whether it’s technical or for Authoring instructions.
Then you may use dialogs helpPath property to link component document to the dialog, the path could be github page or confluence page or any other page. For instance core components uses adobe documents as help document for the component, example Core Image component