Just as turning off and restarting a mutinous Mac sorts out all kinds of mischief, rebooting an impish iPad can instantly sort out an array of annoying problems like freezing and slow performance.
Troubleshoot your iPad
It’s true. Even iPads sometimes misbehave or won’t talk to your Mac. The first thing to do, of course, is to turn everything off and on again, in the hope that things will play nicely once again. If they don’t, though, you might well find something here in this section of Master Your Mac, to get you back on track.