"Frequently Bought Together" Items on Your Etsy Listings

Whoah!  I just looked at my etsy shop without being logged in to my account and I noticed a neat new feature!  At the bottom of the listing there is a little section that highlights items that are frequently bought together and invites your customers to add both items to their cart at once.  Pretty spiffy!  I've been reading about this in the forums and I can't quite pinpoint how long this has been around, but it seems to be a fairly recent addition, like since March.

I can't find a lot of information on it, but here is how I think it works.  If you have sold the item in the listing with another item in your shop, they will show up as "frequently bought together" (even if it's only happened once, I imagine).

I really like this idea and I hope it will lead to greater sales.  A lot of the items in my shop complement each other and this is a great way to get customers to drop them both in their carts with one click.

Here is a close-up.....

On the other hand, I have a listing in my shop that I have never sold before and the FBT prompt does not show up at the bottom of the screen, because it has never been bought together with any item.  Instead,  the old "related items in this shop" picture is there: