With this feature, you can set your phone to move all unwanted or unimportant notifications to the bottom of the notifications page.
You can do that by navigating to Settings > Notifications > Advanced settings and tapping Filter notifications.
Filter notifications
There are three options to filter notifications: Background Activities, Minimized Notifications, and Old Notifications.
Some apps send Background activity notifications to inform you that the app is active in the background. Minimized notifications are those that you manually minimize. Old notifications are the ones that you haven't taken action on for more than a few days. You can individually enable these three options to customize notification filtering.
Credit: SamMobile
