Here is an intro paragraph, maybe a mission, maybe just outlining what's to come.
Heading 2 - What are headings?
A heading helps to organize content in your document - every document has some sort of hierarchy.
Heading 3 - they help organize
Your Heading 3 is content you need to organize under Heading 2.
Heading 4 - it depends on how much content you have
And Heading 4 organizes content under Heading 3.
Heading 3 - they are more than just how text is formatted in your document
But maybe you need to go back to Heading 3 because you have several items to address that fall under Heading 2.
Heading 3 - they help make sure your content follows a pattern
You can see how the headings all layer under each other depending on your content and how you want to organize it.
Heading 2 - Why are they important?
Headings are more than just an outline or organization.
Heading 3 - they help those who use screen readers
Screen readers use tags and reading order or digital documents to read the content out loud to those with limited sight.
Heading 3 - unsurprisingly, they help everyone!
If you set up your headings correctly, you'll be able to make a PDF with linked bookmarks that jump to the content in the document!
Heading 2 - Not just for websites!
Websites have used headings for a looooong time as H2, H3, H4, etc. Even websites that aren't WCAG compliant use headings!