Have you ever been making a phone call and had an email notification chime in your ear? Or how bout a banner notification pop up during a game or video? Sometimes you may just want to get away from alerts and incoming messages. Instead of notification after notification endlessly causing vibrations in your pocket, why not tell your iPhone that you’re out for lunch?
It would be nice for Apple to implement a “Do Not Disturb” feature into the iOS Notification Center, but until that day comes, jailbreakers can tell Notification Center to shut up with a couple of handy Cydia tweaks.