<section> ... </section>
HTML5 only. Represents a section (a thematic grouping of content) of a document or application with its own internal outline and (optionally) a header and footer. The section element is not a generic container; it should be used only if the element’s contents should appear in the document’s outline.
<h1>Chapter 1: Hummingbirds</h1>
<p>A little something on hummingbirds.</p>
<h1>Chapter 2: Turkeys</h1>
<p>This is about turkeys.</p>
section is a semantic element. Its rendering is dependent on style rules.