The iPad gets a productivity boost with iPadOS thanks to such features as the ability to open multiple apps in Split View.
Drag an app out of the Dock (the collection of app icons at the bottom of the screen) to make a Slide Over. Or drag it to the right or left edge of the screen to make a Split View.
To use two apps in Split View:
Open an app.
Swipe up from the bottom of the screen to open the Dock.
On the Dock, touch and hold the second app that you want to open, then drag it off the dock to the left or right edge of the screen.
Here’s how to adjust Split View:
To give the apps equal space on the screen, drag the app divider to the center of the screen.
To turn a Split View into a Slide Over, swipe down from the top of the app.
To close Split View, drag the app divider over the app that you want to close.
(This how-to is based on my experiences and info on Apple’s support pages — where the images sometimes come from.)