This announcement from Ancestry appeared in their blog a month ago and I was excited to learn more. Then a couple of weeks later, Anna Swayne, Ancestry's DNA Educator, posted a blurb, "Getting the Most from Your New Ancestor Discoveries." I do recommend that you go ask Grandma Google (who knows everything) to read and learn more about this exciting development.
Bottom line, Ancestry is taking the results from the DNA that you or I submitted to Ancestry. Then they do their internal magic to make facts and connections know to us that were unknown previously.
Assuming you've taken the Ancestry DNA test, log into your Ancestry account, go to the DNA tab and check your DNA homepage. If you have a New Ancestor Discovery, it will show up on you results page! Maybe you will have none (currently, none, but do check back) and maybe you'll have several. Just click on the card/circle about which you'd like to discover more information. It really is as simple as that.
Of course, all the connections and facts that Ancestry finds for you will come from the Ancestry database but that is a good thing for Ancestry is one of biggest databases of information available to us.
I'm confident that there will be several learning opportunities and tutorials made available by Ancestry to help us learn about this new opportunity but I'm also confident that unless you go searching and want to learn, your new Ancestor Discoveries will remain hidden to you. "Try it, you'll like it," I do recommend.