R1b and 'H' are the most common DNA haplogroups in Europe.
Got a message that said I was probably R1b1b2 so I authorized an additional test to confirm that, FWIW. Apparently they can drill down deeper into the data in some cases where they have a larger database to work with.
Also authorized deeper drilling into the H parameter to see what that shows. It is amazing (to me) that they can take a totally unknown genetic sample and identify the owner so accurately to a small known geographic spot on earth.
Seems like this business is moving so fast that what we know today may seem pretty primitive in a decade or two.