Hierarchy is the order of importance. This can be related to a social group, in a religious, workplace and politics. It Is mostly expressed through naming someone in certain cultures, but it can also be expressed visually through scale, value, color, spacing, placement and other signals. In music, there can be an hierarchy expressed through the tones, pitch and melody. These hierarchy’s help tell a story that is being expressed and define a social norm. Visually you can tell if something has a higher importance if it stands out more through size, scale and variation. It is important to have skills like this to story tell and not have to completely explain every detail.
When I was a kid, I used to be obsessed with Josie and the Pussycat comics. I had so many, so I decided to look into some of the newer ones and find an example. I found an example that visually tells and hierarchy story through the social placement. Josie, the main character and her name is actually in the title, is front and center and larger in scale representing her being the lead singer. Melody and Valerie (bass and drums) are more towards the back and representing a more band feel. The biggest diamond is landing on Josies head making it a focal point to look at.