Apple's Shortcuts app offers hundreds of pre-written algorithms designed to accomplish tasks that would normally take many steps in just one or a few steps. For example, the Home ETA shortcut uses Maps and Messages to find your location, find a route home, estimate the time that route takes and text that time to whoever you set up the shortcut to send it to, all with a single tap.
Apple is opening the door for third-party music streaming apps such as Spotify to use Siri. Users of services other than Apple Music, such as Spotify or Pandora have dreamed of controlling playback with Siri for years. This becomes one step closer to reality thanks to something called Play Media being introduced to developers with iOS 12.