False Headings

Use actual heading elements (H1-H6) for headings and subheadings

Don't "simulate" headings by making the text larger and bold.

Quick fix

Use heading tags (elements) for your headings -use paragraph tags for paragraphs only. This rule applies to other non-paragraph elements such as lists. No matter what you do to make them look like a heading or a list; to a blind person, they're just short paragraphs.