Spit view allows the user to slide right landscape accessing one app that can be used. (If on safari and you want to take a note, notes will be active, Safari will be greyed out) Sliding up gives you access to other apps however the app to the right will be greyed out and can't be accessed on iPad 2, 3,4 Air, Mini, 2 & 3. Split screen multitasking gives access to two apps at the same time. Surfing safari and watching Netflix at the same time. The iPad Air 2 has both features. For the iPad Air split view can be turned into split screen.
Thanks for the detailed explanation! I understand now.