La importancia de los encabezados

El artículo The Importance of Heading Levels for Assistive Technology explica lo importante que son los encabezados para la navegación por una página web:

The HTML specification describes six heading elements: h1, h2, h3, h4, h5, and h6. The number in each of these heading elements reflects its priority, with h1 being the most general and h6 being the most specific. 

This is an important thing to know! WebAIM’s 2017 Screen Reader survey tells us that navigating via headings is the most important way people who rely on assistive technology locate information. Because of this, it’s important to craft your website’s headings properly.