Considering the context, I think it refers to a good visual flow throughout each "page."
Almost all of the vertical scroll comics I read are in Korean, so I don't think those would be helpful. Buuut here's a few that are in English!
Hobo Lobo (HORIZONTAL scroll) (PLEASE look at this because the visuals are sooo amazing!)
Justin Hubbell comics - Some are in page format, some in vertical scroll, some in a "postcard"-like format. It's a mix. It's also not exactly a longform narrative, more like a personal conversation in a comic form!
The Firelight Isle - an interesting example that reads much better on desktop than mobile IMO
My own comic also fits the bill, and has been praised for the use of the format!