Pinning a workspace keeps it at the top of your list — and once pinned, clicking its pin badge opens a small style picker, so a family of related workspaces can share a matching icon and color at a glance.
A single "mark all as read" action clears every workspace's unread indicator in one click, for the mornings you'd rather start clean than click through each one individually.
What you've read follows you. Open a thread on your phone and its unread dot clears on your computer too, and in a browser on another machine, so you never read the same reply twice.
Nested phase workspaces (see Organizing bigger projects with phases) show up indented beneath their parent automatically, so a big initiative reads as one connected group rather than a scatter of unrelated rows.