If you are not logged in, the 'Active Topics' link in the Header, will show a list of all topics that have been created or updated since your last visit.

If you are logged in, the 'Active Topics' link will change to 'My Topics', which gives you a listing of all topics that have been created or updated since your last visit.

There will be also an Second Tab 'Favorite Topics' which shows all Topics which you have tagged as Favorite Topic.