Expectation

Heading levels should follow a clean, deliberate hierarchy:

Heading level 1 <h1>
Heading level 2 <h2>
Heading level 3 <h3>
Heading Level 2 <h2>
Heading Level 3 <h3>
Heading Level 4 <h4>
Heading Level 2 <h2>

The heading hierarchy should be similar to an outline or table of contents for the web page.