[iMore.com]

Everything you need to know about setting up and using Notification Center, from Lock screen notifications to the Today view, banners to popups, sounds to Do Not Disturb!

Notification Center is Apple's attempt to bring order and sanity to the myriad alarms, alerts, messages, calls, announcements, and challenges that flood our iPhones, iPods, and iPads every day. With Notification Center, you can choose on an app-by-app basis between unobtrusive banners, un-ignorable popups, and between beeps, buzzes, or nothing at all. You can badge your icons so you know how many items you have pending, and you can have everything listed for you right on your Lock screen, so you know about it immediately, or whenever you're ready. When too many notifications become interruptions, you can set a timer or flip a switch and silence it all for as little or as long as you want.
Also note, we'll be updating this guide regularly as Apple introduces more Notification Center features, so make sure you bookmark this page and check back!

Full story from the iMore Blog...

[pascalolet]

Hopefully there is a default when all apps are installed to not do any of this notification, and/or the options to ask what you would like to have this app be authorized to do....so far all the apps I've install do so without any interaction/authorization questions...seem like a huge black hole for security issues and more...

[taz323]

Hopefully there is a default when all apps are installed to not do any of this notification, and/or the options to ask what you would like to have this app be authorized to do....so far all the apps I've install do so without any interaction/authorization questions...seem like a huge black hole for security issues and more...

You can switch them off in settings.