Resource: Yoast, "SEO basics: How to use headings on your site"
Headings help users AND search engines read and understand text.
Headings define which parts of the content are important.
<title> or <h1> should be reserved for the page title.
Do not skip headings! If you're looking for a specific size or style, have the CSS adjusted.
Headings need to be descriptive of the content it 'heads.'
Helps with scanning of content
Screen-readers may listen to all the headings to decide what to visit, so content is important here.
<Title>: How to Use headings on your site
<h2> Why Use Headings?
<h3> Use headings to show text structure
<h3> Use headings to improve accessibility
<h3> Use headings to improve SEO
<h2> How to use headings in content
<h3> How headings work in WordPress
<h3> Learning the rules
<h3> An example heading structure
<h2> Headings in wordpress themes
<h2> Check your blog's headings
Where <h2> are section headings, and <h3> are topic headings