There are so many people who tend to clear notifications without having second thought, but later they regret it. So there is an urgent need to find your deleted notifications to read. By default in Android operating system there is no such option, but you can use an app called Notification History Log to access your all your cleared notifications on your phone.
In Notification History Log app we can set the number of notifications to store from 15 to 250. The pro-version of app removes the limit of 250 notifications and removes all advertising. It also adds option to swipe notification to delete it.
This app is compulsory for those who receive lots of notifications on their phone and to have a record of everything that happens on his/her mobile.