Siri will search Groupon for the latest daily deals. Say “Groupon” and Siri will fetch the deals in your area. If it is your first use, Siri will ask you to select your location. Your location can be changed anytime by saying “Groupon Location”. Requires AssistantExtensions (Will Install Automatically). If Siri does not react at first go to Settings -> AssistantExtensions and enable siriSearchGroupon. There is no settings menu for this extension.
AssistantExtensions will be installed. Enable this plugin from Settings