2) After (1), when you browse into a page of one your ancestors, it will show near the bottom of the page your relationship -- parents, grandparents, or the count of great-grandparents.
3) Clicking this relationship will go to a new page listing all branches that have this person identified as an ancestor, showing the root person of each branch. For recent generations, this will show only yourself, but after you go back a few hundred years, and once other users have calculated their ancestors, it will show more.
4) On any page where you can select your own fields to show, including pedigrees and descendant charts, it now includes an "Ancestor" choice. Selecting this will show your ancestors in green.
5) In the search, there is a search criteria to limit the results to only your ancestors, or the ancestors of your root person.
If you add or remove any significant limbs to your tree, it would be good to rerun #1, as this does not update itself.