In our iphone or ipad we have a feature of multitasking which means you can use multiple apps at the same time. First this feature was launched in iOS 9. Here I will tell you how to split screen on ipad:
Click on the three dots of top of the app
Choose split view option
Now you can choose your second app
source- https://ityug247.com/how-to-split-screen-on-ipad/
