In Western culture, we almost take the ability to read for granted! Reading is such a basic requirement for life.
The fact you understand what I am talking about in this article means that you can read! Essentially, it means that you can translate the squiggles and strokes on the page. If I am incapable of writing well or of expressing my ideas then you may read the words but have no idea what I'm trying to say. Therefore, reading with understanding is vital.