Focus Assist is there to make you more productive.
Nelson Aguilar

Nelson Aguilar is a freelance tech writer who really really really really loves the Lakers.
Make it easier to focus on what’s important.
Your computer should help you be more productive, but the same tools that you use for work and school can also be distracting. It’s a double-edged sword, but if you’re on Windows 11, there’s an easy way to stay focused.
Focus Assist, known as Quiet Hours in previous Windows versions, can get rid of distracting notifications on your Windows 11 computer. Simply enable the setting and then choose which notifications you want to hide and receive. The hidden notifications will live in your notification center, where you can check them out whenever you’re finished with your tasks.
If you want to better focus on what you’re doing on your Windows computer, you should use Focus Assist. Here’s how to set it up. And if you’re interested in other useful Windows 11 features, check out how to free up disk space when you’re low on storage and how to take a screenshot on Windows 11.
On your computer running Windows 11, use the search feature to open the Settings application, go into System and then click on Focus assist. You then have three options, to either disable or enable the feature:
Focus Assist has a couple of options to choose from: Priority only and Alarms only.
Underneath those three settings, you can check the box next to Show a summary of what I missed when focus assist was on to receive a notification to view all your hidden notifications when you exit from Focus Assist.
If you’re going to use the Priority only focus level, you can choose which applications you want to still receive notifications from, even if Focus Assist is enabled. To do this, click on Customize priority list underneath Priority only. You’ll see the following options:
Click on Add an app to receive notifications from that app while Focus Assist is on.
To delete an application from the list, click on it and then hit Remove.
Focus Assist must be turned on manually, but there is a way to automatically enable the feature. Underneath Automatic rules, you have the following settings:
Instead of manually turning on Focus Assist, you can have it be automatic.
For all of these features, you can choose a different focus level than what it shows (priority or alarms). Just click on the setting and change it.

source