If you’re using a stock version of Android (4.3+), then you have access to a list of recent notifications through a settings widget. However, this widget is missing from many of the skinned carrier/manufacturer versions of the mobile OS.
As a solution, Notif Log, an app recently suggested by Android Authority, will keep track of all notifications, even after you’ve dismissed them. Additionally, this app has a feature to get a reminder for a specific notification when it’s more relevant. Here’s how to use it:
Step 1: Grab a copy of Notif Log for your Android 4.3+ device.Open the app and grant it access to your notification history (it will prompt you to do so).
Step 2: Open the app and grant it access to your notification history (it will prompt you to do so).

Screenshots by Nicole Cozma/CNET
Once notifications start happening, you can open Notif Log to see them in a list.
Step 3: To delete the notifications, swipe them to the right. To snooze them and be reminded later, swipe left and select a preset time or set your own.
Now you won’t have to spend time hunting through all of your apps to find out what you missed.