"Quality sleep" refers to getting enough undisturbed rest at night, where you wake up feeling refreshed and energized. It means having deep, uninterrupted sleep that allows your body and mind to properly recharge. Full definition
There are many things you can do to help your child or teen get good quality sleep as often as possible. (aboutkidshealth.ca)
If you're not getting quality sleep, it will affect hormones responsible for appetite, and as a result it will make you crave unhealthy foods. (mindbodygreen.com)
Even stress from lack of quality sleep for just a few nights can elevate cortisol, decrease insulin sensitivity and elevate blood sugar. (wellnessmama.com)