Learn the Gestures
Just like macOS, iPadOS offers many trackpad gestures. You can swipe left or right with three fingers to switch between apps, swipe with two fingers to go backward or forward, scroll any direction with two fingers (and even pinch to zoom), swipe three fingers up to return to the home screen, and also swipe up with three fingers and pause to access the app switcher.
Other cool trackpad shortcuts include initiating Slide Over, accessing the dock, and more, with just one finger.
To access the Notification Center, move your cursor to the top of the display (left or center area), then continue moving up. You can do the same thing with the Control Center on the right side of the display. You can close either by going back to the bottom and continuing to move the cursor down.
You can access the dock any time by moving your cursor past the bottom of the display. Continue moving downward to access the home screen.
To access Slide Over, move your cursor to the far right side of the display and continue to move the cursor to the right. Repeat this action to close slide over. You can also access the Slide Over app switcher, by swiping up with three fingers while the cursor is in the Slide Over window.