Out of the box artefacts that read this property. Append the path to your instance URL to open the record and see how the value is used.
Widget server script: EC Request Tabs
This setting is read to disable the Drafts tab for users when its value is exactly “true”; the tab appears only when it is not true and a separate setting enables drafts for that portal. No default is supplied, so an unset value does not disable drafts by itself.
/sp_widget.do?sys_id=3706081a37052210d0675bcc74924bbc
Widget server script: MESP Request Tabs
When set to true, this property prevents users from seeing the Drafts tab, even if drafts are enabled for the portal; admins can control this through the property. No default value is specified in the code.
/sp_widget.do?sys_id=3e9e7441ff8762100334ffffffffff77
Widget server script: My Requests
The setting is checked to decide whether users see the Save as Draft tab: setting it to true hides the tab, while setting it to false only allows the tab when draft saving is enabled for that portal. No default value is supplied in the code.
/sp_widget.do?sys_id=8cc0df25875023000f220cf888cb0bb5
Widget server script: SC Catalog Item
/sp_widget.do?sys_id=3c29786e87133200e0ef0cf888cb0bdf