In-app notifications make keeping track of the most recent activity on your tasks a whole lot easier. You’ll see live notifications appear in the lower left corner of your screen when someone updates or comments on a task that you've subscribed to.
These notifications only appear for a brief moment, but don't worry if you don't catch them in time: they're all stored in the notifications popover, which you can access by clicking the bell icon at the top of the sidebar.
Here, Flow groups notifiations related to tasks and lists for your convenience. By default it shows you all notifications from all of your workspaces, but if you want to focus on your current workspace, you can click "All Notifications" to display more options and select "Workspace Notifications." If you don't want to see any notifications at all, select "Mute Notifications".