3D Touch is available on newer iPhone's and is a capability that you can use where you press down a slight bit longer than normal while pressing on the screen of your device and you will get immediate options. For example, if you hold down on the phone icon you can get 3 options of people to call that you have spoken to last. 3D Touch is best described, as a timesaver.
3D Touch is a pressure-sensitive feature introduced by Apple on its 2015 iPhone 6S and iPhone 6S Plus smartphones. 3D Touch uses capacitive sensors integrated into the smartphone's display to sense three degrees of pressure in a user's touch and respond differently based on the amount of pressure exerted. http://www.webopedia.com/TERM/3/3d-touch.html