Headings

You can use headings...

to divide and organize your content. The headings are not intended as a means for purely visual formatting; please use 'bold' if you just want to make something stand out.
**Keep in mind that if too many items are bolded, nothing stands out for the user.

Headings are designed to help users using screen readers to navigate the site. Headings should be used in an outline format.
**H1 is only used once, for the page title and is applied automatically. Please do not apply an H1 heading to anything else on your page. 

H2 and below should be nested with H2 for main sections on the page, H3 for sub-sections of H2, and so on.