Example of how to use the section elements

This is a level 1 section in the page.

The first true section, belongs to the sectioning root, or the first sectioning element. This means that you won't need to surround the first-level section in section tags.

The first-level section is often just the body, or article. But its easier to remember, that only the subsections should be marked up with section tags.

Source: html section tag

This is a subsection of the main article

This is a level 2 section, a subsection of the main article.

This is a subsection of the first subsection

And this is finally a subsection to the subsection it self, creating a level 3 section.