Aronia is the genus name for the three species of chokeberries. Once chokeberries became a popular additive to mixed fruit juices it immediately became common practice for products to list chokeberry juice as 'Aronia', or some variant thereof, on their ingredients list, for, I think, obvious reasons.
Chokeberries are named for their highly astringent berries. While quite sour, chokeberries are a perfectly healthy berry, and are touted as being high in fiber and vitamin C, being powerful antioxidants, and are sometimes claimed to be good for heart health, to boost the immune system, and even to have anticancer properties.
While chokeberries Aronia has a lot of positive press around its health benefits, its true claim to fame is that it works well in "cherry" flavored drinks, and they are cheaper than are actual cherries. It is very sour, so look for it in the ingredient list of healthy juices rather than fruit punch, but in recent decades it has become quite popular, to the point where some juices actually put Aronia in the front label, rather than hiding it in small print on the back.
All three Aronia species are grown ornamentally as well as a food crop, and are simply named red chokeberry (Aronia arbutifolia), black chokeberry (Aronia melanocarpa), and purple chokeberry (Aronia floribunda). They produce small berries looking something like blueberries (except, some of them are red) and flowers that look something like a small, fancy dogwood blooms that decided to quintuple down on their stamen production. They grow well in a wide range of conditions (hardiness zones 3 to 9), and make a good border shrub, although they do not generally grow thick enough to make a good hedge.