If you tend to dismiss notifications before you have a chance to respond, here are two ways to keep a log of each ping.
Long press on an empty section of your home screen and press Widgets. Then go to settings and drag its icon anywhere on the home screen. Once you place it, you will see a menu asking what you would like the label to point to.
Scroll down to notification log, and you will now have a shortcut on your home screen that will take you directly to your notification history. Current notifications are displayed in white, and the latest ones are light gray. You can click any to go to the app info page.