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<section>

The HTML <section> element represents a generic section of a document, i.e., a thematic grouping of content, typically with a heading.

Content categories	Flow content, Sectioning content, palpable content.
Permitted content	Flow content.
Tag omission	None, both the starting and ending tag are mandatory.
Permitted parents	Any element that accepts flow content. Note that a `<section>` element must not be a descendant of an `<address>` element.
Permitted ARIA roles	alert, alertdialog, application, banner, complementary, contentinfo, dialog, document, feed, log, main, marquee, navigation, search, status, tabpanel
DOM interface	`HTMLElement`

This element only includes the global attributes.

Each <section> should be identified, typically by including a heading (<h1>-<h6> element) as a child of the <section> element.
If it makes sense to separately syndicate the content of a <section> element, use an <article> element instead.
Do not use the <section> element as a generic container; this is what <div> is for, especially when the sectioning is only for styling purposes. A rule of thumb is that a section should logically appear in the outline of a document.

<div>
  <h1>Heading</h1>
  <p>Bunch of awesome content</p>
</div>

<section>
  <h1>Heading</h1>
  <p>Bunch of awesome content</p>
</section>

<div>
  <h2>Heading</h2>
  <img src="bird.jpg" alt="bird">
</div>

<section>
  <h2>Heading</h2>
  <img src="bird.jpg" alt="bird">
</section>

Specification	Status	Comments
WHATWG HTML Living Standard The definition of '<section>' in that specification.	Living Standard
HTML5.1 The definition of '<section>' in that specification.	Recommendation
HTML5 The definition of '<section>' in that specification.	Recommendation

Feature	Chrome	Edge	Firefox (Gecko)	Internet Explorer	Opera	Safari
Basic support	5	(Yes)	4.0 (2.0)	9.0	11.10	4.1

Feature	Android	Edge	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Safari Mobile
Basic support	2.2	(Yes)	4.0 (2.0)	9.0	11.0	5.0 (iOS 4.2)