A section in a document, explaining what WWF is:
The <section> tag defines sections in a document, such as chapters, headers, footers, or any other sections of the document.
The numbers in the table specify the first browser version that fully supports the element.
The <section> tag is new in HTML5.
The <section> tag also supports the Global Attributes in HTML.
The <section> tag also supports the Event Attributes in HTML.
HTML DOM reference: Section Object
Most browsers will display the <section> element with the following default values: