Notifications are taking a big step on in IOS 15. Along with contact photos, there are larger app icons to make them easier to identify.
A notification summary will collect non-critical notifications for delivery during an opportune time like the morning or evening.
Thanks to on-device intelligence, notifications are now arranged by priority with the most relevant appearing at the top.
Urgent messages will always be delivered immediately. You can also temporarily mute an app or messaging thread for the next hour or day.