This policy setting allows you to set the location of the SharePoint Catalog that is designated as Default. The apps for ...

This policy setting allows you to set the location of the SharePoint Catalog that is designated as Default. The apps for Office contained in the Default Catalog can be inserted into Office documents by users.If you enable this policy setting, you can set the URL for the SharePoint Catalog from which users can insert apps into their Office documents.If you disable this policy setting, users cannot insert apps from a SharePoint catalog.If you do not configure this policy setting or set any other policy settings in the Trusted Catalogs folder, users can set their own Default SharePoint Catalog location.