Not just a great feature, this is a potentially life-saving feature that basically turns off notifications while you are driving. Don’t worry though, all your notifications will be waiting for you when you’ve stopped!
However, if you never get behind the wheel of a car, you don’t need it.
Go to Settings > Do Not Disturb > Do Not Disturb While Driving
From there you can choose between manually, or have iOS detect that you’re driving automatically, or have it switch on this feature when it’s connected to your car’s Bluetooth system.