Hierarchy creates an intuitive order of information that reflect its importance and relative utility to the user and organizes complexity into an accessible system.
SOURCES:
Tufte, Edward Rolfe. Envisioning information. Graphics Press, 2013.
Lidwell, William. “Hierarchy” Universal Principles of Design: 125 Ways to Enhance Usability, Influence Perception, Increase Appeal, Make Better Design Decisions, and Teach through Design, Rockport, 2010.
Sources Example:
Oceanic Depth Chart
The depth chart creates a visual hierarchy of information, separating the boundaries and names of places from the display of land a sea topography, which is understandable at a glance through color.

Online Example:
Hiroshima Nagasaki 50 Poster
The hierarchy plays with scale, size and color while the designer leverages our brains requirement to see things only one way at a time to create optical illusions and a sensory hierarchy of seeing and object first one way, then another.


Hello Sarah,
Hello Sarah,
As I learn to see the world through the lens of a designer, I am comforted when there is an order of importance that I can understand. It has become fore evident to me as I see advertisements, also inforgraphic that try to convey important information. I am reminded of the old food pyramid I grew up with. I always understood that I needed to keep a close eye on the items at the top and not consume as smuch.
http://viralrang.com/wp-content/uploads/2016/11/Food-Pyramid.jpg