After installing iOS 11 iPad owners will want to familiarize themselves with the redesigned Dock. To access the Dock just swipe up from the bottom of your display at anytime on your iPad. This includes when you're using any apps or from any other screens, like the Home screen.
You can add up to 13 permanent apps to your Dock by using the new Drag and Drop feature in iOS 11. Just drag whatever app you want to the Dock and it will be added for quick access. Continuing to swipe up once the Dock is open will open your Control Center and the new multitasking interface. The Dock also includes 3 suggested apps in addition to your manually added 13. You can disable suggested apps by following these instructions.