
You'll notice the order jumps around a lot.

The main window lists all the apps and processes currently running on your Mac. You can find it in the /Applications/Utilities folder. You can also force quit misbehaving Mac apps using Activity Monitor.

Unresponsive apps will have a "Not Responding" designation next to them. Click on the Apple logo in the menu bar.There's a second option for quitting an unresponsive app, and it may be one of the more intuitive solutions. If the app is acting up, hold down the Option key and right-click its icon in the Dock to reveal a Force Quit action in the popup menu.

If the beachball stays on the screen for more than a few minutes and you can't interact with the app's interface, this usually indicates the app in question has crashed, which means it's time to force quit it and restart the app to see if you can pick up where you left off in the hope it won't crash again. Macs aren't infallible, and at some point during your time using them you'll come across a situation in macOS where an app has become unresponsive, leaving you without access to its contents and functions, and only a continually revolving beachball for your troubles.
