Multitasking got slightly unpleasant when I started testing out the different ways in which you can use two apps at once.
With Split Screen, you can divide the screen into two sections, with the apps taking the screen 50-50, 75-25, or 25-75. It was great for planning a trip, and I used it to look up sights and book tickets while I jotted things down in the Notes app. I was upset that it didn't work with Google Maps or the Gmail app, though (this is not a Google thing because it worked with Google Photos just fine).
For those apps, I resorted to Slide Over, which creates a window that's about one-third the size of the screen and sits on top. You can choose where you want to position it, and slide it in and out of view as it's needed. I decided this would be perfect for a music player, but Spotify didn't allow it.
Still, I was really happy with picture-in-picture support since I could watch videos or FaceTime while I did other things.