An Android system notification lives in your tray near - permanently, constantly reminding you how many apps are running in the background. (androidauthority.com)
From here, you will scroll down and find the setting for your particular app that is displayed over others in the list of system notifications. (android.gadgethacks.com)
You will still receive system notifications, including messages from other members, or reset password request messages. (gofishdating.com)