Organizing Canvas pages by using headings helps users get a sense of the page’s organization and structure. Visually, headings are presented as larger and more distinct than surrounding text. Making texts larger helps guide the eye around the page. Using headings and making them visually apparent is especially helpful for users with cognitive disabilities.
If the underlying code for a page's headings is correct, screen reader users can also benefit from headings. Screen reader users can navigate a page according to its headings, listen to a list of all headings, and skip to a desired heading to begin reading at that point. Screen reader users can use headings to skip the repeated blocks of content like headers, menus, and sidebars, for example.
To discover more, please visit the Accessibility Challenge | Day One | Headings