All the widgets appear in the Notification Centre’s Today tab, which is the one selected by default, giving you access to all your tools, instantly.
Next to the Today tab is the Notifications View tab. This is where all the notification information you’ve agreed to in Settings are displayed.
To see this just tap on the Notifications tab beside Today.
Go to Setting > Notifications and choose what apps you want to see in the Notification View when you drag it down.
For example you may want to see if someone has called you so it’s a good idea to leave the Phone app in the list. However, you may feel uncomfortable with the idea that anyone could see who rang you, the first few lines of your emails and even your appointments for that day without even having to enter a passcode, so you can disable the Notifications View and the Today View individually straight from here
Similarly you may want to see your text messages in Notifications View. But you might not want to see an alert for every email you receive.
You have two choices here, you can either tap on Mail and turn off Allow Notifications, or you can scroll down to Show in Notification Centre and select 1 – that way you will only see one notification of a missed Mail (which will probably only be useful if you don’t get many emails).