• the main goal of using hierarchy in your designs is to guide the user
• If you think of the information that needs to be shared as a giant rectangle, hierarchy then takes that block of information and parses it out from most important to least important.
• Hierarchy is different from emphasis because it’s about guiding the user’s attention through groups of elements, instead of focusing on the importance of one particular element.

Help people who use assistive technology

• This complexity can make it challenging for screen reader software to follow the correct flow on a screen, and therefore, challenging for users to understand the layout of your interface.
• Hierarchy helps guide the screen reader to pick up the information within your design in the order that you intended it to be read.
• Here’s an example of a screen reader reading headings on Google Search.

In the screen reader box, you can see how each heading being read corresponds to an area within the Google Search page. If these headings were out of order, the user that needs a screen reader would be confused about where they are on a page.