Headings are also called H-tags or header tags because that's how they're written in HTML.
Back to 6th grade: You're outlining your page!
Because Guides is already using Heading 1 and Heading 2 to define the overall page structure
So, inside your box, the top tag should be an h3.
Think of heading levels as a hierarchy, not as a font size!
Chances are you'll never need Heading 5 or Heading 6 (unless you're writing a finding aid).
ADA compliance is determined based on WCAG 2 guidelines.
Starting with WCAG 3, the guidelines will include a rating for heading structure. Using the chart below, a rating of 3.5 is required.
Open a tab with the underlying HTML:
Open a search box.