It makes a copy of your entire system automatically (and your home folder if you want it to) so, in the event that you break something and can’t/don’t want to fix it, you can go back to your most recent back-up from before you messed your system up. I’ve had to use it a few times because I installed some drivers for my drawing tablet that broke more than they fixed and I didn’t want to deal with the pain in the ass of removing them and all of the dependencies they installed.
It makes a copy of your entire system automatically (and your home folder if you want it to) so, in the event that you break something and can’t/don’t want to fix it, you can go back to your most recent back-up from before you messed your system up. I’ve had to use it a few times because I installed some drivers for my drawing tablet that broke more than they fixed and I didn’t want to deal with the pain in the ass of removing them and all of the dependencies they installed.