The article starts by doing the "quantum" thing that really irks me, where they use confusing terminology to make it sound like "FTL communication" without actually saying it. This is garbage that doesn't actually matter to the article.
Basically, they found a way to send quantum entangled photons (which exist in a very delicate unobserved state) through existing fiber optic infrastructure without interfering with the standard internet information already travelling through the fiber. A lot of the difficulty with this is due to signal noise that needs to be filtered out. This will be useful communicating quantum measurements over long distances.
the journalists and researchers are saying the same thing though