This targeting allows you to set up your line items to target certain manufacturers and device models.
You can include device manufacturers and models into targeting and exclude them. When you target a manufacturer, you can exclude some of its device models from targeting at the same time. Likewise, you can exclude a manufacturer from targeting while targeting certain device models produced by this manufacturer.
By default your line items target all device manufacturers and models.
Device Manufacturer and
Device Model reporting keys to analyze performance in u-Slicer.