Anyway, I think there are at least three kinds of reading.
The one where you skim some reviews and read twenty pages is one of them. You can do this in order to just be able to say you've read something without putting in the "work", but you can also do this as part of a serious study of some subject: For example, maybe I only need to read a specific chapter in a book to answer a question I have, or I only need to check every page that mentions a specific keyword related to what I'm studying.
Another way of reading is when you march through a book, page-by-page, as quickly as possible. When you get to the last page you say "done" and then you move on. A few months later, all you mat remember about the book is a outline of the plot, in a novel, or maybe one or two important points, in a non-fiction book.
(I think listening to books in audiobook format is another way of reading, but in practice it's often very close to this second form)
The last one is when you read the book, then think about it, then read it again, then read about it, then keep reading it over and over for the rest of your life.
The latter is much more rewarding, but my point is not that one is better than the other, but that all of these are separate activities that can legitimately be called reading. Maybe we need more words for reading.