The ScrollableMediaContentSpotlight-ATGSlot and ScrollableProductSpotlight-ATGSlot cartridges both refer to an ATG slot. In order for these cartridges to work, you must define the ATG slots, as well as the targeters that populate the slots and the scenarios that link them together, and provide the path to the slots when you add the ScrollableMediaContentSpotlight-ATGSlot and ScrollableProductSpotlight-ATGSlot cartridge to a page in Experience Manager. See the Personalization Programming Guide and Personalization Guide for Business Users for detailed information on creating slots, targeters, and scenarios.