ARIA Roles confer additional meaning to elements on your page that allow assistive techonologies to interpret interactive parts and present them appropriately.
Semantic elements such as <main>, <article> and <button> have implicit roles.
Other elements such as <div>, <span> and <ul> often require a role attribute to indicate their purpose within interactive areas, e.g. tabsets, menus, trees and sliders.
You should choose appropriate controls (such as Landmark Containers) to build your page and you shouldn't add role attributes to those elements.
When you do need to add a role to a control, you can set it in the ARIA section of the control's properties. You can choose from the dropdown or type your own role.
