What kind of function is centralized mode in the first place?
Originally, macOS had a "good night mode" that temporarily turned off notifications. The centralized mode in macOS Monterey is easy to understand if you think of it as an extension of this good night mode.
Centralized mode is the same as traditional good night mode in that notifications are temporarily turned off. However, in centralized mode, more flexible settings are possible, such as notifying only incoming calls from specific parties or allowing only notifications from specific apps.
You can also flexibly set the conditions for switching modes, such as turning it on automatically when you start using a specific app, or turning it on automatically when you come to a specific location.
What's even better about centralized mode is the ability to sync state with other Apple products such as iPhones, iPads, and Apple Watches. When you turn on centralized mode on your Mac, centralized mode is turned on on all devices that use the same Apple ID.
Similarly, you can turn off notifications for all devices from one device at once, so you can easily create an environment where you can concentrate (there is also a way to prevent synchronization).
Centralized mode is a big feature that can synchronize the situation with iPhone with iOS 15 and iPad with iPad OS 15.