Mute a workspace's notices

Each workspace’s menu (the three dots in the sidebar or in Workspaces) has Mute notifications: you choose for how long (an hour, three hours, until the end of the day, one or three days, or Until I turn it back on) and the workspace stops telling you when a task finishes. If a task needs your permission, it still tells you.

While it lasts, the workspace shows a crossed-out bell and the menu offers Unmute notifications.

More details in Finding what you created.