You can uninstall apps to free up memory.
When you use this method, all app settings and data are deleted from the tablet memory.
Press and hold any app.
Press Rearrange Apps.
Press the delete icon next to the required app.
Press the Home key to return to the home screen.
When you use this method, all app settings and data are saved in the tablet memory and are restored when you reinstall the app from App Store on your tablet.
Press iPad Storage.
Press the required app.
Press Offload App.