We've now built the foundation of a notification system. As with activities, it's initially limited to likes and favorites but we'll be adding more notification types soon, all individually configurable.
We'll also soon support email notifications, but for now notifications are onsite.
We've changed the right nav bar, adding a bell icon to indicate whether there are notifications. You'll notice we've also changed the Settings and Log out links to be icons too.
When you have notifications, the bell will turn red and you can click it to see the notifications. You can also clear notifications form here.
Note that if you are a member of a team, the notifications dropdown spans both the public site and teams.
Each notification type can be toggled under Notifications on the Settings page.